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Creator
- Indiana. Geological Survey3
- Wayne, William J. (William John), 1922-[remove]3
- Illinois State Geological Survey2
- Atherton, Elwood, 1909-1
- Burger, Ann M.1
- Forsyth, Jane L. (Jane Louise), 1921-1
- Gray, Henry Hamilton, 1922-1
- Johnson, Gerald H.1
- Keller, Stanley J.1
- Nicoll, Robert S.1
- Wier, Charles E. (Charles Eugene), 1921-1