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Author/Creator
- Geological Survey (U.S.)6
- Sims, P. K. (Paul Kibler), 1918-20113
- Houston, Robert S. (Robert Stroud), 1923-2
- Cordell, Lindrith1
- Graff, P. J.1
- Kansas Geological Survey1
- Karlstrom, Karl E.1
- McCafferty, Anne1
- Missouri. Division of Geology and Land Survey1
- Peterman, Zell E.1
- Schulz, K. J.1
- Wisconsin Geological and Natural History Survey1