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Author
- Environmental Systems Research Institute (Redlands, Calif.)58
- ESRI28
- Economic and Social Research Institute (Reston, Va.)28
- Tele Atlas North America, Inc.23
- Earle, Carville.22
- Heppen, John.22
- Louisiana State University (Baton Rouge, La.).; Dept. of Geography and Anthropology.22
- Otterstrom, Samuel.22
- TomTom North America, Inc.19
- United States Geological Survey19
- National Atlas of the United States and the United States Geological Survey17
- Esri4
- Bureau of Transportation Statistics3
- U.S. Department of Commerce, Census Bureau, Esri3
- Department of Commerce, Census Bureau, Geography Division2
- Smithsonian Institution, Global Volcanism Program, National Atlas of the United States, and the United States Geological Survey2
- U.S. Census Bureau, Geography Division2
- ArcAtlas: Our Earth (ESRI)1
- Economic and Social Research Institute1
- Environmental Systems Research Institute, Inc. (ESRI)1