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Publisher
- Geological Survey (U.S.)47
- [London] : War Office, 1941.32
- Trenton, N.J. : New Jersey Department of Environmental Protection, 1981.21
- Washington, D.C. : Army Map Service, U.S. Army, 1943.17
- N.Y. State Museum,11
- Bethesda, MD : [s.n.], 1995.6
- Geological Survey of Canada,5
- Ontario Geological Survey,5
- Dr. Ludwig Reichert,4
- Bethesda, MD : [s.n.], 1997.3
- California Geological Survey3
- Washington, D.C. : [s.n.], 1995.3
- [London ; Washington, D.C.] : War Office ; Army Map Service, U.S. Army, 1943.3
- California. Division of Mines and Geology2
- Dept. of Conservation and Natural Resources ;2
- Fairfax, VA : [s.n.], 1995.2
- New York State Museum :2
- Science Press,2
- Trenton, N.J. : Geological Survey of New Jersey, 1869.2
- United States. Central Intelligence Agency. Cartography Center2