Drs. A.D. Steenkamp
Leiden,
Netherlands
Gian Michele & Enrico Maria Pini
Firenze,
FI, Italy
Philip Prins
London (Birr),
Canada
Joe Phillips
New Orleans,
LA, United States
Daniel Thierstein
Bern,
Switzerland
Edmund Brumfitt
London,
United Kingdom
Ulrich Engel
Stuttgart,
Germany
David G. Waxman
Great Neck,
NY, United States
Francesco Chellini
Firenze,
FI, Italy
Johan Hammarström
Umeå,
Sweden
Michael Hackenberg
El Cerrito,
CA, United States
Christoph Schäfer
Düsseldorf,
Germany