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Creator
- Indiana. Geological Survey8
- Gray, Henry Hamilton, 1922-5
- Illinois State Geological Survey4
- Keller, Stanley J.3
- Wayne, William J. (William John), 1922-3
- Cox, E. T. (Edward Travers), 1821-19072
- Forsyth, Jane L. (Jane Louise), 1921-2
- Johnson, Gerald H.2
- Levette, G. M. (Gilbert M.)2
- Schneider, Allan F. (Allan Frank), 1926-2
- Wier, Charles E. (Charles Eugene), 1921-2
- Atherton, Elwood, 1909-1
- Ault, Curtis H.1
- Bleuer, N. K. (Ned Kermit), 1943-1
- Burger, Ann M.1
- Gooding, Ansel Miller1
- Hill, John R,1
- Lesquereux, Leo, 1806-18891
- Lineback, Jerry A. (Jerry Alvin)1
- Michigan. Geological Survey1