Stanley K. Haines
Keith G. Papke
Arthur Lennox Coulson
Dieter Stoppel
Silva, Michael A.
Robert C. Horton
T. Hallissy
Indian Bureau of Mines. Mineral Economics Division.
Jerome B. Burnett
A. Ziserman
Joyce A. Ober
G. R. Guillet
A. H. Chidester
Joel B. Pomerene
Andrzej Paulo
Donald Albert Brobst
Alekseĭ Konstantinovich Savelʹev
Meral Kayhan
Eugenio Tavera Amezcua