Walter W. Fowkes, Frank P. Haver, Marvin L. Whisman, R. B. Porter, R. G. Dressler, Willis Beckering, B. H. Eccleston, D. H. Baker, Lester Larsen Hirst, P. A. Wasson, Walter H. Oppelt, D. W. Frommer, Frederick E. Armstrong, Wayne R. Kube · 1961
Arno Carl Fieldner, Arthur Lowell Fox, Francis Harold Gibson, Joseph Dana Davis, United States. Bureau of Mines, Walter Alfred Selvig, Dewey A. Reynolds, Henry Herman Storch, William Harlan Ode, J. L. Elder, Lester Larsen Hirst, Clarence Raymond Holmes, James T. McCartney · 1944
