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- ESRI250
- Economic and Social Research Institute (Reston, Va.)16
- Environmental Systems Research Institute (Redlands, Calif.)14
- United States Geological Survey9
- Economic and Social Research Institute6
- Tele Atlas (Firm : U.S.)6
- Tele Atlas North America, Inc.5
- AND International Publishers N.V.3
- National Atlas of the United States and the United States Geological Survey3
- DeLorme Publishing Company, Inc.2
- Sistemas de Información Geográfica, S.A. de C.V.1
- Smithsonian Institution, Global Volcanism Program, National Atlas of the United States, and the United States Geological Survey1