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Author
- Thomas, William G., 1964-6
- National Atlas of the United States4
- United States. Bureau of Transportation Statistics4
- Hunt, Raquel3
- Colton, J. H. (Joseph Hutchins), 1800-18931
- Environmental Systems Research Institute (Redlands, Calif.)1
- Geological Survey (U.S.)1
- Rumsey, David, 1944-1
- United States. Federal Railroad Administration1