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Creator
- Illinois State Geological Survey[remove]4
- Indiana. Geological Survey[remove]4
- Gray, Henry Hamilton, 1922-2
- Keller, Stanley J.2
- Wayne, William J. (William John), 1922-2
- Atherton, Elwood, 1909-1
- Bleuer, N. K. (Ned Kermit), 1943-1
- Hill, John R,1
- Johnson, Gerald H.1
- Lineback, Jerry A. (Jerry Alvin)1
- Schneider, Allan F. (Allan Frank), 1926-1
- Wier, Charles E. (Charles Eugene), 1921-1