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Creator
- Geological Survey (U.S.)[remove]19
- Herron, W. H. (William Harrison), 1865-[remove]19
- Marshall, R. B. (Robert Bradford), 1867-194916
- U.S. Coast and Geodetic Survey12
- Ellis, J. R. (Topographer)9
- United States. Army. Corps of Engineers9
- Kentucky Geological Survey8
- Gehres, W. S. (Wilmer Sherman), 1887-19637
- Goodlove, C. W.7
- Herrington, R. M. (Russell McKee), 1890-19777
- Hawkins, Geo. T. (George T.)5
- Illinois State Geological Survey4
- Tweedy, Frank, 1854-19374
- Harrison, R. L. (Topographer)3
- Miller, W. L. (Topographer)3
- Ohio. Division of Geological Survey3
- Smith, Glenn S. (Glenn Shepard)3
- Sadler, C. L.2
- United States. Army2
- Burney, H. E.1