Edward Hull
Unknown Author
Canadian Institute of Mining and Metallurgy
M. E. Wilson
Gordon John Williams
Page, David
Edmunds, F. H.
W. G. Shackleton
Jean Jung
Willmott, Arthur B.
D. H. Tarling
Thomas Crook
Edwin Wilson Tooker
I. Lerche
Charles Wales Drysdale
Mario E. E. Rossi
John B. Hanley
Alan Mara Bateman
New Mexico Geological Society. Field Conference
Ries, Heinrich