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Author
- Geological Survey (U.S.)52
- Bateman, Andrew F.7
- Geological Survey (U.S.), cartographer2
- Brock, R. W. (Reginald Walter), 1874-19351
- Cox, Dennis P.1
- Cross, Whitman, 1854-19491
- Froelich, A. J. (Albert Joseph), 1929-1
- Geological Survey of Canada1
- Geological Survey of India1
- Liberian Geological Survey1
- Lindsey, David A.1
- Moore, Richard T.1
