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- Environmental Systems Research Institute (Redlands, Calif.)12
- Michael Bauer Research GmbH3
- TomTom North America, Inc.3
- DeLorme Publishing Company, Inc.2
- U.S. Census Bureau, Geography Division2
- U.S. Department of Commerce, Census Bureau, Esri2
- Department of Commerce, Census Bureau, Geography Division1
- Economic and Social Research Institute (Reston, Va.)1
- Esri1
- National Atlas of the United States and the United States Geological Survey1