Simeon BALL (Eindhoven, The Netherlands; London, UK)
Arrigo BONISOLI (Potenza, Italy)
Francis BUEKENHOUT (Bruxelles, Belgium)
Marco BURATTI (Perugia, Italy)
Peter J. CAMERON (London, UK)
Charlie J. COLBOURN (Waterloo, Canada)
Henry CRAPO (Paris, France)
Frank DE CLERCK (Gent, Belgium)
Dick HACHENBERGER (Augsburg, Germany)
Hans HAVLICEK (Wien, Austria)
Josef LAURI (Malta)
Fred PIPER (London, UK)
Alexander POTT (Magdeburg, Germany)
Heinrich WEFELSCHEID (Duisburg, Germany)