Maurice E. Tucker
Ernest G. Ehlers
Ferdinand Zirkel
Siegfried Matthes
Martin Okrusch
J. T. Greensmith
Stephen Robert Nockolds
R. L. Stanton
Cornelis Klein, Anthony R. Philpotts
Walter Hähnel
Howel Williams
Unknown Author
Wolfgang F. Tegethoff
John D. Winter
Richard Vincent Dietrich
W. G. Ernst
N. Petford
Society of Economic Paleontologists and Mineralogists