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Creator
- Geological Survey (U.S.)160
- Indiana. State Highway Commission (1919-1953)85
- Kingsbury, Robert C.78
- Hollingsworth, John M.68
- Renshawe, John H.45
- Hawkins, Geo. T. (George T.)37
- Goodlove, C. W.31
- United States. Army Map Service28
- Herron, W. H. (William Harrison), 1865-27
- Indiana. Department of Geology and Natural Resources26
- Illinois State Geological Survey24
- Marshall, R. B. (Robert Bradford), 1867-194924
- United States. Army. Corps of Engineers20
- Indiana University. Research Computing Center19
- Collett, John, 1828-189918
- McKinney, R. C. (Robert C.)18
- Schellie Associates18
- Ashley, Geo. H. (George Hall), 1866-195117
- Cubberley, Ellwood P., 1868-194117
- Rand McNally and Company15