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Author/Creator
- Geological Survey (U.S.)4,106
- U.S. Atomic Energy Commission241
- United States. National Park Service67
- Emory University. Department of Geology56
- Geological Society of America55
- Kentucky Geological Survey52
- United States. Agency for International Development50
- Darton, Nelson Horatio, 1865-194841
- Afghanistan. Department of Geological Survey37
- Moffit, Fred H. (Fred Howard), 1874-1958?36
- Roehler, Henry W.32
- West Virginia Geological and Economic Survey32
- Du Bray, E. A.31
- Michigan. Geological Survey Division31
- United States. Army. Corps of Engineers31
- Capps, Stephen R. (Stephen Reid), 1881-194930
- United States. Bureau of Indian Affairs30
- Dallas County Community College District29
- King, Philip B., 1903-198729
- Maryland Geological Survey28