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- Environmental Systems Research Institute (Redlands, Calif.)10
- National Atlas of the United States9
- National Geophysical Data Center8
- TomTom North America, Inc.7
- Tele Atlas B.V.6
- Geological Survey (U.S.)5
- National Atlas of the United States and the United States Geological Survey5
- United States. Bureau of Transportation Statistics5
- Bush, Charles A.4
- GfK MACON4
- Reed, John Calvin, Jr. 1930-4
- Economic and Social Research Institute (Reston, Va.)3
- Esri3
- Tele Atlas North America, Inc.3
- ESRI2
- United States. Bureau of the Census. Geography Division1
- United States. Federal Aviation Administration1
- United States. Federal Highway Administration1
- United States. Federal Transit Administration1
- Vanderbilt Engineering Center for Transportation Operations and Research1