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- ESRI244
- CHGIS, Harvard Yenching Institute23
- Environmental Systems Research Institute (Redlands, Calif.)7
- Economic and Social Research Institute5
- Economic and Social Research Institute (Reston, Va.)5
- Tele Atlas (Firm : U.S.)5
- United States Geological Survey4
- Tele Atlas North America, Inc.3
- TomTom North America, Inc.3
- Department of Commerce, Census Bureau, Geography Division2
- AND International Publishers N.V.1
- DeLorme Publishing Company, Inc.1
- Environmental Systems Research Institute, Inc. (ESRI)1
- Esri1
- National Atlas of the United States and the United States Geological Survey1
- New York (N.Y.). Department of Information Technology and Telecommunications.1
- Regional Systems Analysis Project, UC-Davis. Zumou Yue, G. William Skinner, and Mark Henderson.1
- United States. Bureau of Transportation Statistics1
- United States. Bureau of the Census.1