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Creator
- Geological Survey (U.S.)6
- Hawkins, Geo. T. (George T.)4
- Renshawe, John H.4
- Goodlove, C. W.3
- Ashley, Geo. H. (George Hall), 1866-19512
- Kindle, E. M. (Edward Martin), 1869-19402
- Price, J. A.2
- United States. Army Map Service2
- Cooke, Chas. E. (Charles E.)1
- Indiana. Department of Geology and Natural Resources1
- Minto, George1