David E. Fogelson / H. N. Smith / Bruce W. Naugle / Carl Rampacek / D. A. Douglass / Edward Gerard King / Harold William Sohns / John H. Hild / John J. Mulligan / John W. Chester / Lloyd Harold Banning / Richard Edward Lindstrom / Richard F. Zaffarano / Richard J. Leary / Robert L. Montgomery / Thomas Calvin Atchison / United States. Bureau of Mines / Van E. Shaw / Vernon B. Dale / Victor Kalcevic / W. V. Kuster / Willis Beckering / A. U. Christensen / B. J. Mitchel / Cecil Q. Cupps / Charles K. Rose / Donald J. Bauer / E. E. Jukkola / George W. Birge / Harry C. Fuller / J. D. Lankford / Kenneth Keith Kelley / Theodore D. Hubert / W. E. Anable / Walter W. Fowkes / Wilbur I. Duvall / William Alan McKinney / William E. Tournay / John M. Gomes / Joseph Fry / Julius Bruce Clemmer / P. T. Waddleton / W. C. Kommes / W. I. R. Murphey / William F. Hergert | 