Arno Carl Fieldner / George Allison Irland / Gustav Wade / James Washington Paul / John M. Devine / United States. Bureau of Mines / William Bennett Berwald / Clarence John Wilhelm / Joseph Dana Davis / Leopold Nicholas Plein / Theodore W. Johnson / Ludwig Schmidt / Reinhardt Thiessen / Ernest Bowman Kester / Walter Alfred Selvig / Dewey A. Reynolds / F. W. Jung |