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Creator
- Indiana. Department of Geology and Natural Resources15
- Shannon, C. W. (Charles William), 1879-193411
- Shannon, M. E.7
- Hole, Allen David, 1866-19404
- Tharp, W. E. (William Edgar)3
- United States. Bureau of Soils3
- Ellis, R. W. (Robert W.)2
- Beals, C. C.1
- Coryell, Horace Noble, 1888-19651
- Edmonson, James Bartlett, 1882-19541
- Erni, C. P. (Chester Prall), 1896-1
- Geib, W. J. (Warren Jacob), 1880-1
- Hertenstein, Earl1
- Hurst, Lewis A. (Lewis Alexander), 1874-1
- Marean, Herbert W.1
- Middleton, Philip (Soil surveyor)1
- Orahood, C. H. (Charley Harold), 1882-1
- Schroeder, Frank C.1
- Watkins, W. I. (William Isaac), 1888-19731
- Wiley, W. E. (William Emmett), 1894-19671