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- ESRI241
- Economic and Social Research Institute (Reston, Va.)34
- Tele Atlas North America, Inc.17
- Environmental Systems Research Institute (Redlands, Calif.)9
- DeLorme Publishing Company, Inc.8
- United States Geological Survey8
- Michael Bauer Research GmbH3
- Economic and Social Research Institute2
- AND International Publishers N.V.1
- United States. National Aeronautics and Space Administration1
- WorldSat International Inc.1