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Creator
- Indiana. Geological Survey10
- Collett, John, 1828-18998
- Cox, E. T. (Edward Travers), 1821-19075
- Gray, Henry Hamilton, 1922-5
- Illinois State Geological Survey4
- Keller, Stanley J.3
- Wayne, William J. (William John), 1922-3
- Forsyth, Jane L. (Jane Louise), 1921-2
- Johnson, Gerald H.2
- Patton, John B. (John Barratt), 1915-2
- 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
- Borden, W. W. (William Wesley), 1823-19061
- Burger, Ann M.1
- Gooding, Ansel Miller1
- Hill, John R,1
- Lineback, Jerry A. (Jerry Alvin)1