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Creator
- Collett, John, 1828-189917
- Cubberley, Ellwood P., 1868-194117
- Ashley, Geo. H. (George Hall), 1866-195114
- Cox, E. T. (Edward Travers), 1821-190712
- Levette, G. M. (Gilbert M.)9
- Blatchley, Raymond S. (Raymond Sillliman)8
- Foerste, Aug. F. (Aug. Frederic), 1862-19367
- Cumings, E. R. (Edgar Roscoe), 1874-19676
- Kindle, E. M. (Edward Martin), 1869-19405
- Siebenthal, C. E. (Claude Ellsworth), 1869-19305
- Borden, W. W. (William Wesley), 1823-19064
- Price, J. A.4
- Shannon, C. W. (Charles William), 1879-19344
- Hopkins, Thomas Cramer, 1861-19353
- Indiana. Department of Geology and Natural Resources3
- Gorby, S. S. (Sylvester Scott)2
- Hesler, R. S.2
- Holman, H. B.2
- Jones, Grove B., 1877-2
- Leach, J. C.2