by Carl Rampacek, Edward G. King, H. N. Smith, Hans G. Wolfhard, John J. Mulligan, John William Chester, Oliver Q. Leone, Phillip G. Pigott, R. B. Fisher, S. R. B. Cooke, T. E. Gray, Thomas C. Atchison, United States. Bureau of Mines, Victor Kalcevic, William A. Stickney, Willis Beckering, William Joseph Campbell, A. U. Christensen, Arthur E. Bruszak, Eugene Robert Palowitch, Harry C. Fuller, J. D. Lankford, J. R. Nettle, J. W. Smith, John W. Thatcher, Kenneth Keith Kelley, Melvin Leon, Miles E. Tyrrell, Waldemar M. Dressel, Walter W. Fowkes, William Alan McKinney, William E. Tournay, D. H. Baker, Julius Bruce Clemmer, P. T. Waddleton, W. C. Kommes

1959