- Geological Survey (U.S.)4
- Trace, Robert Denny, 1917-3
- Bryant, Bruce, 1930-2
- Kehn, Thomas M.2
- Rogers, William B.2
- Sample, Raymond Dewey2
- Keith, Arthur1
- Palmer, James Edward1
- Seeland, David A.1
- Sutton, Arle H. (Arle Herbert), 1896-1
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