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Author
- ESRI31
- Tele Atlas North America, Inc.30
- Economic and Social Research Institute (Reston, Va.)26
- United States Geological Survey18
- National Atlas of the United States and the United States Geological Survey9
- Environmental Systems Research Institute (Redlands, Calif.)7
- Smithsonian Institution, Global Volcanism Program, National Atlas of the United States, and the United States Geological Survey2
- Bureau of Transportation Statistics1
- Department of Commerce, Census Bureau, Geography Division1
- Economic and Social Research Institute1
- Health Forum, L.L.C.1
- National Park Service1
- Tele Atlas (Firm : U.S.)1
- Tele Atlas B.V.1