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Creator
- Blair, H. B. (Herbert Buxton), 1860-19055
- Burney, H. E.1
- Clarkson, C. D. S.1
- Clement, S. E. (Stephen Earl), 1894-19813
- Cooke, Chas. E. (Charles E.)8
- Ellis, J. R. (Topographer)11
- Gehres, W. S. (Wilmer Sherman), 1887-19639
- Geological Survey (U.S.)104
- Goodlove, C. W.27
- Graff, Fred, Jr.3
- Griffin, W. H. (William H.)6
- Harrison, R. L. (Topographer)3
- Hawkins, Geo. T. (George T.)34
- Herrington, R. M. (Russell McKee), 1890-19777
- Herron, W. H. (William Harrison), 1865-27
- Higginson, W. S. (William Smith Muir), 1894-19842
- Illinois State Geological Survey20
- Illinois. Department of Registration and Education2
- Indiana. Department of Conservation2
- Jennings, J. H. (James H.), 1864-19271