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1959 to 1966
Jacques A. Dauphin, France
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1966 to 1968
N.H. Gardner, United Kingdom
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1968 to 1971
Hans Ruhfus, Germany
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1971 to 1980
Noël L. Piccot, Switzerland
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1980 to 1984
J.Casanova, France
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1984 to 1987
J. Nunneley, United Kingdom
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1987 to 1990
Francesco Villa, Italy
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1990 to 1993
Jacques A. Dauphin, France
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1994 to 1998
Erik Hanke, Austria
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1998 to 2002
Peter Stebler, Switzerland
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2002 to 2005
Karl Javurek, Austria
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2005 to 2011
Christian Kauter, Switzerland
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2011 to 2014
Barry Sayer, South Africa
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2014 to 2015
Karl Javurek, Austria
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2015 to 2017
Antonio Vincenti, Lebanon
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2017 to 2018
Matthew Dearden, United Kingdom
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2018 to date
Tom Goddard, United Kingdom