From left to right, roughly:
Robson, Behr, Artin, Plaumann, Catoiu, V. Bovdi, Cortzen, Kraft, ?, ?, Beaulieu, Vonessen, Osterburg, ?, Blair, ?, Vishne, Blattner, Stafford, Passman, ?, Seelinger, Beattie, Abrams, Saltman, Schacher, ?, Kirkman, Rowen, Taft, Bergen, Formanek, Zelmanowitz, Kuzmanovich, Bergman, Raianu, Guralnick, Letzter, Farkas, ?, Letzter, ?, ?, Lynne Small, ?, Lanski, ?, Lance Small, ?, ?, ?, Chin, Montgomery, A. Bovdi, ?, Smoktunowicz, Zelmanov, ?, Pendergrass, Wald, Zhang, Jain