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- Geological Survey (U.S.)6
- Marshall, R. B.2
- Davis, George R.1
- Douglas, Edward Morehouse, 1855-19321
- Grand Canyon Natural History Association1
- Matthes, François, 1874-19481
- Maxson, John H.1
- Maxson, John Haviland, 1906-1
- Sargent, Rufus Harvey, 1875-19511