Emerson G. Crosthwaite, James Kincheon Searcy, John Augustus Baker, Loyd L. Young, Miles LeRoy Eddards, W. C. Griffin, W. H. Robinson, L. R. Kister, William Evans Price, William James Powell, Glenn Scarcia, Herbert Alfred Swenson · 1949
Edward A. Moulder, Edwin Wallace Lohr, Frank Saverio Grimaldi, Geological Survey (U.S.). Water Resources Division, George Lawrence Bodhaine, Judith Weiss Frondel, Loyd L. Young, Max Gregg White, Robert Paul Jones, Walter Stanley White, Alfred E. Torrey, Benjamin Earl Jones, Michael Fleischer, Norman MacLaren Denson, W. H. Robinson, F. C. Koopman · 1949
Adrian E. Scheidegger, Cleo Ladell Sainsbury, H. R. Feltz, I. S. McQueen, James Richard Carter, John T. McGill, Kenneth Orris Emery, Loyd L. Young, Roy Edwin Oltman, Stanley Alfred Schumm, William W. Sayre, Adrian Ramond Chamberlain, Alfred Rice Green, B. B. Hanshaw · 1963