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- Montgomery, Pauline13
- Tharp, W. E. (William Edgar)3
- Indiana. Department of Geology and Natural Resources2
- Rose, C. M. (Soil surveyor)2
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- Bushnell, T. M. (Thomas Mark), 1889-19761
- Coryell, Horace Noble, 1888-19651
- Dunton, W. Herbert1
- Geological Survey (U.S.)1
- Herron, W. H. (William Harrison), 1865-1
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- 1915[remove]58