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- ESRI132
- Environmental Systems Research Institute (Redlands, Calif.)10
- Tele Atlas North America, Inc.8
- Economic and Social Research Institute (Reston, Va.)7
- AND International Publishers N.V.4
- DMTI Spatial Inc.3
- Sistemas de Información Geográfica, S.A. de C.V.3
- Michael Bauer Research GmbH2
- National Atlas of the United States and the United States Geological Survey2
- DeLorme Publishing Company, Inc.1
- Department of Commerce, Census Bureau, Geography Division1