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Author/Creator
- Geological Survey (U.S.)11
- Fullerton, David S.5
- Maps.com (Firm)4
- Bush, Charles A.2
- Colton, Roger B. (Roger Burnham), 1924-2
- Montana Bureau of Mines and Geology2
- Richmond, Gerald Martin, 1914-2
- Cole, Elizabeth F.1
- Emmett, William W.1
- Gadd, N. R.1
- Garrity, Christopher P.1
- Geological Survey of Canada1
- Hartshorn, Joseph H. (Joseph Harold), 1922-1
- Louisiana. Department of Transportation and Development1
- Morris, Edward E.1
- Pennsylvania. Bureau of Topographic and Geologic Survey1
- Soller, D. R. (David R.)1
- State Geological and Natural History Survey of Connecticut1
- Stone, Janet Radway1
- Sweetkind, Donald S. (Donald Steven)1