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Author/Creator
- Maps.com (Firm)29
- Geological Survey (U.S.)9
- Adam Matthew Digital (Firm)1
- Barrios, Boris1
- Chirico, Pete1
- Clements, J. Morgan (Julius Morgan), 1869-1
- Dartnell, Peter1
- Finlayson, David P.1
- Golden, Nadine E.1
- Great Britain. Colonial Office1
- Inland Oil Preparedness Project (U.S.)1
- National Archives (Great Britain)1
- Rowe, Barbara L.1
- Sasser, Charles E. (Charles Edward), 1950-1
- Storlazzi, Curt D. (Curt Daron)1
- United States. Agency for International Development1
- United States. Army. Corps of Engineers1
- United States. National Park Service1
- Valder, Joshua F.1
- Valseth, Kristen J.1