Geological Survey (U.S.), Donald Albert Brobst, Leonard Benjamin Riley, Betsy A. Weld, Margaret S. Griffin, George W. Brett, Luna Bergere Leopold, Donnell Foster Hewett, Robert Roy Coats, Daniel P. Bauer, Walton Henry Durum, Roy Edwin Oltman, Walter Basil Langbein, Albert M. Moore, Arthur Pierce Butler, Claude Huffman, D. R. Shawe, H. Edward Clifton, Hollis Milon Orem, Arthur Hubert, Forrest Graham Poole, J. D. Mensik, R. L. Phillips