- Colton, Roger B. (Roger Burnham), 1924-4
- Schnabel, Robert W.3
- Fritts, Crawford E. (Crawford Ellsworth), 1927-1
- Geological Survey (U.S.)1
- Langer, William H.1
- O'Leary, Dennis W.1
- Randall, Allan D., 1932-1
- Simpson, Howard E.1
- Warren, Charles R., 1913-1
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