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- ESRI180
- AND International Publishers N.V.14
- Sistemas de Información Geográfica, S.A. de C.V.9
- National Atlas of the United States and the United States Geological Survey8
- DMTI Spatial Inc.5
- Tele Atlas North America, Inc.5
- World Wildlife Fund2
- Bureau of Transportation Statistics1
- Department of Commerce, Census Bureau, Geography Division1
- Economic and Social Research Institute (Reston, Va.)1
- Environmental Systems Research Institute (Redlands, Calif.)1
- Michael Bauer Research GmbH1
- Smithsonian Institution, Global Volcanism Program, National Atlas of the United States, and the United States Geological Survey1
- United States Geological Survey1