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- Butts, Charles, 1863-19462
- Darton, Nelson Horatio, 1865-19482
- Adams, George I. (George Irving), 1870-19321
- Cross, Whitman, 1854-19491
- Geological Survey (U. S.)1
- Geological Survey (U.S.)1
- Jaggar, Thomas Augustus, 1871-19531
- Keith, Arthur1
- Lindgren, Waldemar, 1860-19391
- Stone, Ralph W. (Ralph Walter), 1876-19641
- Woolsey, Lester Hood, 1877-19611
