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Author/Creator
- Geological Survey (U.S.)9
- Denson, N. M. (Norman MacLaren), 1914-3
- Pierce, Frances Wahl3
- Crysdale, Bonnie L.2
- Johnson, Edward A. (Edward Allison), 1940-2
- Brady, Lawrence L.1
- Hardie, John K.1
- Kansas Geological Survey1
- McLellan, Marguerite W.1
- Missouri. Division of Geology and Land Survey1
- Molnia, Carol L.1
- Pierson, Charles Thomas, 1918-1