- Kehn, Thomas M.5
- Geological Survey (U.S.)4
- Hansen, Dan E.2
- Smith, Avery E.2
- Gardner, James H.1
- Goudarzi, Gus H. (Gus Hossein), 1918-1
- Kentucky Geological Survey, issuing body1
- Miller, Thomas P., 1938-1
- Trace, Robert Denny, 1917-1
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