McGARVIE SMITH INSTITUTE HISTORY UPDATE 2000-2011 MCGARVIE SMITH INSTITUTE HISTORY UPDATE 2000 – 2011
This History Update, for the period 1 January 2000 to 30 June 2011, has been prepared by the Chairman of
Trustees, R A Farrar, Trustee Dr F R Doughty and Secretary N Hil man. It has been reviewed and approved by
the Trustees of the McGarvie Smith Institute.
This Update follows that compiled by the Chairman and approved by the Trustees for the period 1992 – 2000,
which in turn brought up to date the activities, policies and philosophies of the Institute as recorded in the Printed
History for the period 1918 – 1992 written by Dr Ursula M L Bygott at the request of the then Trustees.
Objectives of the Institute
Production of the McGarvie Smith Anthrax Vaccine ceased prior to the period under review. The Trustees
consequently adopted as the prime objective of the Institute, that expressed in Clause 5(b) of the McGarvie
“To promote and advance either alone or in conjunction with any person or body corporate, or with the Department of Agriculture of NSW , veterinary science and the sciences of pathology, microbiology, parasitology, or any allied science so far as they relate to veterinary science, and to engage in the promotion of scientific research and the equipment of laboratories in NSW or elsewhere in such manner and at such cost as the trustees may from time to time determine.”
The Institute focuses on making grants to fund research in the livestock industries. The Institute has a limited
capital base and seeks appropriate niche research projects. The Institute works closely with the NSW
Department of Primary Industries and th of the University of Sydney.
In accordance with Clause 5(c) of the McGarvie Smith Incorporation Act 1928: The Institute may take or accept any gift, subsidy or endowment, whether subject to any special trust or not, for all or any of the objects of the body corporate and to carry out any special trust to which such gift subsidy, or endowment may be subject Trustees Presently in Office The current Trustees of the McGarvie Smith Institute are as follows:
Robert Al an Farrar – Chairman (appointed 30 April, 2001)
Bruce Morgan Christie BVSc, MACVSc – Trustee (appointed 3 February, 1999)
Renata Mary Brooks BVSc, GAICD, Grad. Cert. Bioethics – Trustee (appointed 30 April, 2001)
George Wharton Mack – Trustee (appointed 2 July, 2001)
James David Osborn Boyd – Trustee (appointed 16 September, 2002)
The Hon Justice William Henric Nicholas BA,LLB,QC – Trustee (appointed 2 June, 2003)
Dr Francis Richard Doughty BVSC, PhD – Trustee (appointed 17 November, 2003)
Present Trustees’ Experience Allan Farrar has had 60 years in the wool and livestock industries. He was CEO and a Director of Pitt Son and
Badgery Ltd and an Executive Director of Elders Pastoral Group. He has served as Chairman of the NSW Grain
Corporation and Chairman of the Australian Wool Exchange. He was a Councillor of the Royal Agricultural
Society of NSW and Chairman of its Sheep and Wool Committee.
Bruce Christie is Principal Director Biosecurity in the NSW Department of Primary Industry. He has over 30
years of experience working in biosecurity initially as a veterinarian dealing with animal health and production
issues affecting food production animals and since 2004 across the broader biosecurity spectrum of animal and
plant pests and diseases. He has successfully led and managed projects and staff as: Team Leader on the
Indonesian AusAID project (EIVSP II), Institute Supervisor at the Elizabeth Macarthur Agricultural Institute,
Program Manager Quality Assurance within the Animal Industries Division of NSW DPI, Director Animal and
Plant Biosecurity. As NSW Chief Veterinary Officer he has led responses to a number of exotic disease
incursions, the most recent being the successful eradication of Equine Influenza (EI) from NSW and Australia.
Renata Brooks is the Deputy Director – General, Catchments and Lands with the NSW Department of Primary
Industries. Renata leads the Catchment and Lands Division within Primary Industries to deliver social, economic
and environmental outcomes from the State’s Crown lands and catchments, with a particular emphasis on
natural resource management and regional service delivery. She has been a member of the NSW Department of
Primary Industries Executive Board from its creation in 2004. Renata holds a Bachelor of Veterinary Science
from the University of Sydney, with first class honours, a Graduate Certificate in Bioethics from the University of
Technology, Sydney, and is a graduate of the Australian Institute of Company Directors. She holds a variety of
George Mack was President of the Sydney University Post Graduate Veterinary Research Foundation for 16
years. He was raised on the land and is a leading farmer and grazier from the Western Districts of NSW. He was
a Councillor of the NSW Graziers Association and served as Vice Chairman of the Wool Council of Australia. He
served three terms as a Director of the Australian Wool Corporation and as a member of the International Wool
Secretariat and the Wool Research and Development Corporation. He is an Honorary Fellow of the University of
David Boyd retired as a Director of John Swire & Sons Pty Ltd and Clyde Agriculture Limited in 2009. He stood
down in 2007 as Chairman and C.E.O. of Clyde which was a major irrigated cotton, wool, wheat, mutton, lamb
and beef producer with holdings spread across northern New South Wales and western Queensland. Mr. Boyd
spent over 50 years working in Australian agriculture including a 28 year career with the Dalgety organisation,
culminating in his appointment as the national General Manager of rural operations He has served on the
Boards of Cotton Australia, the Australian Wool Exchange, Wool International, and Australian Wool Innovation
Limited. He is currently a Director of Tandou Limited.
Henric Nicholas was admitted to the Bar of New South Wales on 21 October 1966, and was appointed one of
Her Majesty’s Counsel on 2 September 1981. He was sworn in as a Judge of the Supreme Court of New South
Wales on 5 February 2003 and sits in the Equity Division of the Court. Justice Nicholas was brought up on a rural
property near Tumut NSW. He graduated from the University of Sydney with a BA 1961 and LLB in 1964. In
1988 he established a successful Aberdeen Angus stud at Willow Tree. He was a Councillor of the Royal
Agricultural Society of New South Wales, a fellow of the Council of St Paul’s College, University of Sydney and
its chairman 2002 – 2007. He is a Director of the Kimberley Foundation Australia and was chairman 1999 -
2009. He is a former Director of the Sydney Theatre Company.
Frank Doughty is a registered veterinary surgeon, graduated with a Bachelor of Veterinary Science from the
University of Sydney in 1962 and obtained a PhD in 1974 for studies on neurofibroma (a cancer of the peripheral
nerves) in cattle. Dr Doughty had 42 years of service in animal health, both field and laboratory services with
NSW Department of Agriculture. He established and was Director of the Regional Veterinary Laboratory, Wagga
Wagga for 10 years until 1983. From 1983 – 1996 he was Director of Animal Quarantine NSW and gained
overseas experience in USA, UK, Hong Kong and France. In 1996 he established AQIL Consultancy, a
foundation member of Australian Society of Veterinary Pathologists. Currently Chairperson of the Director
General’s Animal Ethics Committee and member of the University of NSW and the NSW Schools Animal Ethics
Committees. Member of the Australian Institute of Export and a Life Member of the Australian Veterinary
Association (AVA). AVA representative on NSW Agricultural and Animal Services Committee under the State
Policy for Appointment of Trustees
In each appointment of a Trustee, a Memorial of Change in Body Corporate has been lodged with the relevant
authority & a notice published in the Government Gazette as required by the McGarvie Smith Institute
The current Government appointees are Bruce Christie (1999) & Renata Brooks (2001). The other Trustees have
been appointed by a resolution of the Trustees at a meeting as required by the Act.
The criteria for appointment of Trustees have been consistent with past policy of maintaining a spread of
qualifications both in the field of Veterinary Science and in business affairs to provide the Institute with continuity,
solidarity, and skill in assessing research projects and in investment of funds and preservation of the Institute’s
Retirements and Appointments of Trustees and Secretary
In January 2001 the Trustees accepted the recommendation of the Chairman, Mr E G Chaston that a retirement
age of 80 years should be implemented and that there should be an orderly phasing in of this policy. In March
2001 Mr Roy Watts’ resignation was accepted and Renata Brooks was confirmed by the Director General of the
Department of Agriculture as a Trustee nominated by the NSW State Government. Mr W P Nicholas also retired
at the January meeting. The Chairman expressed a vote of thanks to Messrs Watts and Nicholas for the great
assistance that they had provided to the trust over very many years. Mr Watts responded and thanked the
trustees for their help and support over 20 years as a trustee.
At the April 2001 meeting it was resolved that Ms R Brooks and Mr R A Farrar be appointed as Trustees. Mr J J
Doohan OBE, asked the Trustees to accept his retirement and recommended Mr George Mack of “Weemabah”
Trangie NSW as his successor. It was resolved that Mr Mack be invited to attend the next meeting of trustees.
At the July 2001 meeting of Trustees, the Chairman thanked Mr Doohan for his valuable contribution to the
Institute over 34 years before accepting his retirement. Mr George Mack’s appointment as a Trustee was
approved. The Chairman, Mr E G Chaston, stated that he intended to retire as Chairman, but continue in his
capacity as a Trustee. Mr Farrar was nominated and seconded as the new Chairman and approved by the
Trustees. Mr Farrar said he was honoured and humbled to be appointed to follow Mr Chaston as Chairman. He
referred to Mr Chaston’s great contribution as a trustee for 34 years and Chairman for 14 years. He thanked the
Trustees for the trust placed in him and said he would do his best. At the August 2001 meeting, a vote of thanks
was recorded to both Mr Doohan and Mr Chaston for their respective contributions to the Institute.
At the October 2001 meeting, the Chairman advised the meeting that several Trustees had attended a memorial
service for the late Mr Roy Watts which had been a moving tribute to his life and his contribution to veterinary
At the September 2002 meeting Mr Chaston’s resignation as a Trustee was accepted and The Chairman
thanked him again for his valuable and significant contribution to the Institute during his association over 35
years. It was proposed to appoint Mr J D O Boyd as a Trustee to replace Mr Chaston and this was resolved.
At the February 2003 meeting, a letter of resignation as Secretary to the Trustees from Mr Colin Spencer was
tabled, effective from the date of the meeting and was read to the meeting by the Chairman. It was resolved to
accept the resignation and to appoint Mr Neil Hillman of Court & Co as the new Secretary of the McGarvie Smith
At the June 2003 meeting Mr H P Anderson tabled his resignation as a trustee. This was accepted and the
Trustees thanked Mr Anderson for his great contribution as a Trustee over many years and wished him well in
the future. The Chairman said he had approached Mr Justice Henric Nicholas, QC, who had a rural background,
about becoming a Trustee of the Institute. Justice Nicholas had indicated his willingness to join the Board as a
Trustee. It was resolved to approve the appointment of Justice Henric Nicholas as a Trustee from the beginning
At the August 2003 meeting Mr Doug Mumford announced to the meeting that he would be retiring from the
Board of Trustees from the next meeting. He proposed that his replacement would be Dr Frank Doughty. The
Chairman said that the Trustees would accept Mr Mumford’s decision to retire with regret and paid tribute to his
great contribution to the McGarvie Smith Institute and to veterinary science over many years. At the November
meeting the appointment of Dr Frank Doughty as a Trustee was confirmed.
Research Projects, Scholarships, Prizes and Other Funding by the Institute 2000 – 2011 Purchase of Laboratory equipment Bactec Machine specifically to detect the growth of Mycobacterium paratuberculosis in culture. This
provided a valuable service in the Ovine Johnes Disease (OJD) campaign in NSW. (Regional Veterinary
Digital camera and associated software for electronic digital images of slides and transparencies of gross and
microscopic pathology at Elizabeth Macarthur Agricultural Institute. (EMAI, 2004)
Enhancing livestock handling, research equipment for electronic identification and data recording. This
provided new livestock restraint equipment and upgraded existing equipment at the Camden campus for the
conduct of field trials. (University of Sydney, 2006).
Research Projects Liver Fluke drug resistance. Financial assistance (operating expenses) to undertake liver fluke drug resistance
survey throughout NSW. (EMAI, 2000)
Research on the identification and characterisation of Mycoplasma antigens. This study showed that Mycoplasma hyopneumoniae processes a number of surface proteins which play an important role in the
pathogenesis of mycoplasma pneumonia in pigs. Subsequently these researchers were successful in attaining a
further substantial research grant from the Australian Research Council. (EMAI, 2002)
Salmonella enterica research project. Development of diagnostic Polymerase Chain Reaction (PCR) tests to
detect isolates of Salmonella enterica that possess clustered antibiotic resistance. Multidrug resistant isolates of
Salmonella appeared suddenly from 1997 onwards in chickens and humans. The development of these
diagnostic assays and preliminary data enabled the researchers to compete more effectively for a large NHMRC
grant to further this research. (EMAI, 2005)
Tribulus staggers in livestock. To experimentally reproduce Tribulus staggers in sheep by chronic
administration of purine alkaloids recently identified in the plant Tribulus terrestris (caltrops, cathead). Successful
experimental reproduction of Tribulus staggers is an essential prerequisite for the development of an informed
advisory policy for NSW graziers. (Regional Veterinary Laboratory, Orange, 2005)
Development of an adherence assay for screening potential vaccine antigens formycoplasma diseases.
To produce components of an experimental vaccine that block Mycoplasma hyopneumoniae colonisation of the
pig respiratory tract. This is very important in control and prevention of mycoplasma respiratory diseases in pigs,
the most economically significant diseases affecting pig production worldwide. (EMAI, 2006)
Prevalence survey of Pestivirus, Campylobacter and Leptospira infection in beef herds and effect on herd fertility in NSW Southern Slopes Region. (DPI, 2007) The impact of unvaccinated Merino wethers on shedding in Gudair vaccinatedflocks. Findings suggest
that leaving wethers unvaccinated is likely to considerably increase pasture contamination with Mycobacterium avium subspparatuberculosis, thus vaccination decisions made on individual farms may influence Ovine Johnes
Disease control at a regional and national level. (University of Sydney, 2007)
Footrot Project ,gene sequencing of new isolates of D. nodosus. Molecular sequencing of fimbrial genes
(FIMA) of these new isolates helped to identify these as serogroup M. This was the first report on the
identification of serogroup M in Australia. This research led to the development of a specific PCR diagnostic test
for serogroup M of the ovine footrot bacteria D.nodosus ,very important in the control of chronic footrot. Further evaluation of the role of Polymerase Chain Reaction test (PCR) for the diagnosis of Anthrax.
Comparing the sensitivity and specificity of microscopy with PCR testing over time after death of the animal. This
research aims to lead to a progressive reduction in the prevalence of anthrax by dealing effectively with the
disease when it occurs to minimise the chances of future outbreaks. (DPI, 2008)
Development of diagnostic tests for Bovine Theileriosis. Effective diagnostic test such as PCR proposed,as
it is not feasible to continue to send samples to Japan for species typing. . (EMAI, 2009) Assessment of the effectiveness of incineration to decontaminate carcases onproperties where Anthrax has occurred. (DPI, 2009) Epidemiology and zoonotic potential of Cryptosporidia infection in calves To determine the prevalence of
Cryptosporidia in calves and determine the proportion of Cryptosporidia isolates from calves that have zoonotic
potential. Identify risk factors for exposed humans to reduce the potential for zoonotic transfer. (DPI, 2009)
Optimising Mycoplasma hyopneumoniae challenge system for vaccine evaluation. To identify an ideal
challenge system for M.hyopneumoniae that can be applied to future assessment of vaccines for mycoplasmal
Financial Assistance to Attend International Conferences
Veterinary Research Officer (EMAI) to attend 5th International Sheep Veterinary Congress, Stellenbock, South
Departmental Veterinary Officer to attend 9th international Symposium on Veterinary Epidemiology and
Economics, Breckenridge, Colorado, USA (2000)
Departmental Officer (EMAI) to attend 6th International Verotoxigenic Escherichia coli (VTEC ) conference,
Research Officer (EMAI) to undertake an Anthrax study tour in USA (2003)
Veterinary Research Officer (EMAI) to attend 15th International Organisation for Mycoplasma meeting, Atlanta,
Senior Veterinary Officer to attend 8th International Colloquium on Paratuberculosis, Copenhagen, Denmark
Senior Veterinary Officer to attend 9th International Colloquium on Paratuberculosis, Tsukuba, Japan (2007)
Senior Veterinary Officer to attend 10th International Colloquium on Paratuberculosis, Minneapolis, USA(2009)
McGarvie Smith Roy Watts Memorial Scholarship
In February 2003 the Trustees agreed to set up this Scholarship and to name it in memory of Roy Watts. The
Scholarship was to be awarded annually to a suitably qualified applicant to undertake the Veterinary Public
Health Management Post Graduate Course at the University of Sydney. To date three scholarships have been
awarded and the first recipient has graduated whilst the remaining two students are still progressing through
Publicity of this scholarship in The Land newspaper, Institute webpage and University curriculum has assisted in
raising the profile of McGarvie Smith Institute and awareness of the Institute’s role in research funding.
McGarvie Smith Institute Prize
This Prize has been awarded annually since 2006 to the most outstanding Veterinary Science student in Rural
Public Practice extramural rotation in final year studies at University of Sydney. A Trustee is invited to present
this prize at the annual awards ceremony. This prize contributes significantly to raising the profile of the
McGarvie Smith Institute and the importance of careers in Veterinary Public Health in the Faculty of Veterinary
Other Funding
Donations were made to the Post Graduate Foundation in Veterinary Science (2000 and 2002)
Further comments re funding
The Trustees have been concerned from time to time during the period under review at what they considered to
be a low level of applications for funding coming forward. In December 2002 the Trustees discussed the extent
of funding that had been given over the past three years. It was noted that there was a limited client base to
which funding could be provided and that this is the prime reason that not a lot of projects had been submitted for
consideration. It was agreed that the funding of appropriate niche research projects of value to the livestock
industries was the primary objective of the McGarvie Smith Institute given the limited capital base.
The Institute does not contribute funds to property, salaries or ongoing projects. An updated system of reporting
on projects was agreed and was added to the conditions of granting funds.
In February 2007 the Trustees formed a Working Party to discuss ways of raising the profile of the Institute. As a
result an article was approved for publication. The article appeared in The Land newspaper, Agriculture Today as
well as the University of Sydney and NSW DPI websites.
A media release in June 2008 from the NSW Minister for Primary Industries in respect of anthrax testing at EMAI
acknowledged the contribution by McGarvie Smith Institute towards the purchase of the PCR machine involved
in the development of the diagnostic test for anthrax.
By March 2010, the number of funding applications being received by the Institute was considered by the
trustees to demonstrate that the profile of the McGarvie Smith Institute had increased. Trustees continue to be
proactive in encouraging projects and to maintain the Institute’s profile. The recent level of funding applications
The Trustees maintain close and productive relationships with the Faculty of Veterinary Science, University of
Sydney and the Deans of the Faculty have addressed meetings of Trustees and discussed research issues
relevant to the livestock production industries. There is a similarly close and productive relationship with the
EMAI. One instance of this was the demonstration to the Trustees of the Remote Video Imaging Equipment and
Software , funded by McGarvie Smith Institute. At the August 2004 meeting of Trustees, Dr Tony Ross (EMAI)
provided a commentary on the use of this equipment as it was displayed on a computer screen during remote
Trustees received regular updates via NSW Animal Health Surveillance (DPI NSW); Animal Health Surveillance
(National); Roundhouse Newsletter (Veterinary Science, Uni. of Sydney).
At the October 2001 meeting the possibility of a website for the McGarvie Smith Institute was raised and
discussed by the Trustees who were very supportive of the concept. At Trustees’ meetings during 2002 the set
up costs, maintenance and ongoing costs of a website were discussed and it was resolved to progress the
proposal. It was agreed to investigate the hosting of the website by NSW Agriculture but did not wish to be too
closely identified with either Sydney University or NSW Agriculture. The trustees identified the benefits of having
a website as including raising the profile of the Institute in veterinary circles, providing contact details, and details
It subsequently emerged that the Institute could have its own web address under a hosting arrangement with
NSW Agriculture. It was also resolved to put together a brief on website content which would contain the
following: background information on McGarvie Smith; template for funding requests; a clear indication that the
Institute was restricted to funding projects in NSW only; a copy of the latest Annual Report; a summary of the
history of the Institute; final reports received for projects that had been funded; scholarships and prizes funded by
the Institute. The website was launched on 23 March 2005 and is regularly updated by the Secretary
Financial and Investment Policy
At the conclusion of the 1992 – 2000 History Update, the Trustees reported that they had sought advice from
Court and Co Financial services on an ongoing basis and had acted on recommendations of that body. The
Trustees had decided to adopt a broad policy of maintaining up to 40% of capital in conservatively managed
equity funds. The balance of 60% would continue to be applied as in past years, to bonds, bank deposits and
similar investments. It was noted that as at 31 December 1999, the combined assets of the Institute stood at
There was no change in investment policy during 2000 and at the January 2001 meeting, the Trustees reaffirmed
the long term investment strategy. At the March 2001 meeting it was noted that some international exposure
appeared to be a responsible spread of risk and opportunity. At the August 2001 meeting, the ability of the
Institute to invest in shares directly was raised and it was noted that the institute had chosen to invest in
Managed Funds in order to achieve a spread of investments given the amount of funds available. At the October
2001 meeting the Trustees were advised that Tasman Financial Planning had taken over the financial advisory
and funds management business of Court and Co. There was discussion on the asset al ocation of 60% in
defensive investments and 40% in growth investments. Tasman did not advocate a change in policy. The
Trustees resolved to review the asset al ocation on a periodical basis to assess its suitability. The investment
policy was maintained during 2002. The reduction in interest rates and volatility in equity markets were noted as
the main reason for a decline in income that year.
During 2003 the Trustees sought submissions on investment management and provision of financial advice from
three providers. It was resolved to appoint Bell Potter Securities as the investment advisors to the McGarvie
Smith Institute subject to a review after 12 months and with a full quarterly review of investments be provided.
During 2004 the Trustees maintained the Institute’s investment policy on the basis of advice received from Bel
At the March 2005 Trustees meeting it was noted that the value of growth investments had increased to
represent about 66% of total assets leaving 34% in cash based investments. After receiving advice from Bel
Potter, it was agreed to make sales of some equities to bring the ratio of growth investments to cash to
approximately 50/50. The investment policy and basic portfolio structure was maintained during 2006.
There was no significant change in policy or in the portfolio during 2007. The problems emerging in the USA with
sub-prime mortgages were noted. The rising equity market resulted in the ratio of growth investments to cash
During 2008, equity markets fell significantly and the Institute’s portfolio was adversely affected. Managed funds
performed worse than direct equity investment. Bell Potter recommended a reduction of 20% - 30% in the
investment in managed funds with reinvestment in sound direct equities. The basic investment policy was
considered to be consistent with the objective of preserving the Institute’s capital and its ability to provide
At the first meeting of Trustees for 2009, the Trustees considered a memorandum from the Chairman in respect
of the chal enging market conditions and the effect on the value of the Institute’s investments. The Trustees gave
consideration whether the investment policy should be changed to say 75% cash and 25% equities or whether
the Institute should persist with the current 50/50 split. It was noted that the role of the Trustees was to invest in
accordance with the needs and objectives of the Institute and its sustainability. In considering whether the
institute should have a higher proportion in cash, there was the issue of potentially missing a market recovery if
equities were sold. Also the consideration that cash was not giving a very good return at that time. The Trustees
agreed they were comfortable with the 50/50 split of equity and cash and reiterated their belief that the current
allocation of investments continued to be a responsible policy and one which would enable the Institute to
achieve its objectives. The direct equities held by the Institute were reviewed and it was recommended by Bell
Potter that the holdings be retained as they were all generally in good shape and were sound companies.
During 2010 action was taken to sell down some managed investments as previously agreed and also to make
some reductions in direct equities with the objective of achieving close to the agreed 50/50 ratio of growth to
cash investments. The previously existing investment policy has been retained through the first half of 2011.
However, the Trustees have kept the various issues under close review and have sought and accepted advice
from Bell Potter. As at 30 June 2011, the value of the net assets of the institute was $2,733,549.
The table below shows the figures for Operating Surplus; Research Grants and the closing Market Value of the
Institute’s assets for the financial years 1999/ 2000 to 2010/2011 inclusive.
McGarvie Smith Institute 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
(8,840) (27,500) (19,760) (17,000) (34,253) (23,124) (31,341) (68,601) (10,250)
1,078,266 1,178,184 1,409,664 1,312,807 516,275
1,575,399 1,671,797 1,714,265 1,765,445 1,893,477 2,177,466 2,398,309 2,774,581 2,565,837 2,460,274 2,611,490 2,733,549
Bij het beklimmen van de Kilimanjaro (hoogte 5.895 meter) of Mount Meru (hoogte 4.566 meter) is het goed om te weten wat acute hoogteziekte is, waardoor het ontstaat, hoe je de symptomen kan herkennen en welke maatregelen genomen moeten worden als het zich voordoet. De beklimming van de Kilimanjaro of Mount Meru gebeurd onder leiding van een gids. Het zijn erkende gidsen die kennis hebben van ho
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