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Author/Creator
- Geological Survey (U.S.)20
- Sims, P. K. (Paul Kibler), 1918-201110
- Kisvarsanyi, Eva B.3
- Missouri. Division of Geology and Land Survey3
- North Dakota Geological Survey3
- Arkansas Geological Survey2
- Dutton, Carl E. (Carl Evans), 1904-2
- Wisconsin Geological and Natural History Survey2
- Anderson, E. D. (Eric D.)1
- Anderson, Raymond R.1
- Anderson, Sidney B.1
- Bailes, Alan H.1
- Bickford, M. E. (Marion Eugene), 1932-1
- Bradley, Reta E.1
- Brown, Vernon M.1
- Bryant, Bruce1
- Cannon, William F.1
- Cordell, Lindrith1
- Dart, R. L. (Richard L.)1
- Dicken, Connie L.1