Honorary members
E. von Tschermak-Seysenegg
Austria, 1956
J.C. Drost
The Netherlands, 1959
W. Rudorf
Germany, 1965
J. Bustarret
France, 1968
E. Akerberg
Sweden, 1972
J.G. Hawkes
United Kingdom, 1989
J.S. Bojanowski
Poland, 1989
H. Hänsel
Austria, 2004
F. Nuez-Vinals
Spain, 2004
G. Röbbelen
Germany, 2004