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- Geological Survey (U.S.)990
- Geological Survey (U.S.), issuing body670
- United States. Congress. House514
- United States. Geological Survey444
- Grover, Nathan Clifford257
- Geological Survey (U.S.). Water Resources Division153
- United States. Army. Corps of Engineers99
- Follansbee, Robert81
- Henshaw, Fred F., (Fred Forbes)74
- United States. Bureau of Reclamation56
- Lamb, W. A. (William Alfred), 1881-55
- Horton, A. H. (Albert Howard), 1875-194553
- Parker, Glenn L., (Glenn Lane)51
- Leighton, Marshall Ora48
- United States. War Department. Engineer Dept48
- McGlashan, H.D., (Harry Deyoe)46
- United States. War Department40
- Purton, A.B.38
- Paulsen, Carl G.32
- United States. Geological Survey. Division of Hydrography30