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- United States. Department of Housing and Urban Development9
- Environmental Systems Research Institute (Redlands, Calif.)5
- National Atlas of the United States2
- Oak Ridge National Laboratory2
- TomTom North America, Inc.2
- U.S. Census Bureau, Geography Division2
- Armstrong, Jake H.1
- California. Office of Statewide Health Planning and Development1
- Tele Atlas (Firm : U.S.)1
- United States. Bureau of Transportation Statistics1
- United States. Department of State. Humanitarian Information Unit1
- United States. Department of State. Office of the Geographer1