Dr. Christine Grahamer
München,
Germany
Simon Stähli
Urdorf,
Switzerland
Drs. A.D. Steenkamp
Leiden,
Netherlands
Robert Schoisengeier
Wien,
Austria
Carl Blomgren
Petaluma,
CA, United States
George Krzyminski
Bolivia,
NC, United States
Robert P. Jordan, Jr.
Hilton Head,
VA, United States
David Clarke
Norwich,
United Kingdom
Philip D. Burden
Chalfont St Giles,
Herts, United Kingdom