by Sebastian J. Aresco, Cecil Q. Cupps, Francis R. McDonald, Francis X. Tartaron, Frederick W. Hoertel, George S. Koch, Henry G. Iverson, J. M. Stuve, Jack Smith, John S. Berber, Leo A. Schrider, Murray Weintraub, Paul G. Barnard, R. J. Heemstra, Robert W. Van Dolah, Russell E. Griffin, Thomas E. Hill, Van E. Shaw, William P. Haynes, John D. Ruschak, Arthur Alonzo Orning, Eben L. Singleton, Frank C. Gibson, Glenn L. Cook, H. B. Neilson, James G. Donaldson, John B. Janus, Joseph Fry, Richard F. Link, Roald Edmund Lindstrom, Robert Lawrence Marovelli, Robert T. Johansen, Willis A. Calhoun, J. N. Murphy, Cecil H. Schwartz, Harry R. Johnson

1967

by D. A. O'Keefe, Donald E. Kirby, Fun-Den Wang, J. E. Dooley, John M. Gomes, Karl C. Dean, L. C. Headley, Lester J. Crow, Noel N. Moebs, Richard A. Dick, Robert Lynn Crosby, Tedford C. Briggs, United States. Bureau of Mines. Staff, Coal Sampling and Inspection, Victor R. Spironello, C. I. Pierce, Donald H. Desy, Dwight E. Couch, Eben L. Singleton, H. Austin Tucker, Joseph W. Sterner, Kenji Uchida, Meng-Cherng Sun, Robert C. Bates, Ronald F. Kendall, Donald E. Hirsch, Morton Min Wong, Robert M. Doerr, Thomas A. Sullivan, W. K. Sawyer, William C. Hill

1969

by Henry G. Iverson, Eben L. Singleton

1967

by Alton B. Whitehead, David Burgess, Eliot J. White, Foster Fraas, George E. Fish, Howard E. Powell, Jerry B. F. Champlin, Judy W. Montoya, Miles E. Tyrrell, Paul A. Wasson, Raynard V. Lundquist, Richard Clarke Corey, Sebastian J. Aresco, Sidney Katell, Willis A. Calhoun, C. H. Schwartz, C. P. Haller, Donald W. Frommer, Eben L. Singleton, Gilbert M. Farrior, Howard H. Heady, John H. Faber, Michael George Zabetakis, N. Chardoul, Oren C. Baptist, R. G. Havens, T. E. Hill, Carlon Sanford Land, D. W. Bridges, Leonard F. Heising, Paul Wellmanm, R. F. Abernethy, R. E. Lubker, R. L. Blake

1962

by A. A. Berk, A. C. Rice, Arthur F. Colombo, C. S. Tout, Carl J. Chindgren, Donald William Scott, Eben L. Singleton, G. W. Elger, Gene Asai, George W. Birge, Gerald V. Gibbs, John Ward Smith, Karl Clyde Dean, Mark I. Copeland, Ralph V. Higgins, Thomas T. Campbell, Vernal E. Edlund, Wesley T. Holmes, William Harlan Ode, Lloyd Harold Banning, Alan J. Leighton, C. A. Stone, David E. Wolfson, Donald W. Frommer, Francis Harold Gibson, G. L. Hopps, Irving L. Turner, Ivan L. Nichols, J. P. McCullough, L. Carpenter, Lester C. Bauerle, R. S. Lang, W. Floyd Holbrook, F. Donald Bloss, Joe B. Rosenbaum, Raynard V. Lundquist

1962