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Creator
- Geological Survey (U.S.)[remove]28
- Hawkins, Geo. T. (George T.)14
- Renshawe, John H.14
- Goodlove, C. W.11
- Illinois State Geological Survey10
- United States. Army Map Service5
- Herron, W. H. (William Harrison), 1865-4
- Marshall, R. B. (Robert Bradford), 1867-19494
- Tweedy, Frank, 1854-19374
- U.S. Coast and Geodetic Survey4
- United States. Army. Corps of Engineers4
- Blair, H. B. (Herbert Buxton), 1860-19053
- McKinney, R. C. (Robert C.)3