by Edward C. Tarpley, Elton L. Litchfield, J. F. Barkley, J. H. Field, Jack G. Walters, John B. Gayle, Kenneth M. Earl, Norman E. Hanna, R. L. Montgomery, Richard N. Appling (Jr.), Ronald Barany, T. E. Gray, Thomas M. Nasiatka, Van E. Shaw, Eugene Robert Palowitch, G. H. Damon, George W. Birge, Hilmer Karlsson, William H. Eddy, William Harlan Ode, C. F. Stark, Paul Sutton, Robert W. Van Dolah

1959

by Clarence Watson Owings, Joe Perry Morris, John W. Moore, R. Ward Stahl, Richard N. Appling (Jr.), United States. Bureau of Mines, W. A. Calhoun, W. A. Cole, C. H. Dodge, H. N. Dunning, John P. Harmon, V. C. Petersen, W. A. Grosh, C. J. Stehlik

1957