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- United States Geological Survey72
- Environmental Systems Research Institute, Inc. (ESRI)61
- Hart Energy Publishing47
- ESRI34
- Environmental Systems Research Institute (Redlands, Calif.)32
- National Atlas of the United States and the United States Geological Survey23
- Platts20
- Esri19
- TTG, Inc.16
- Tele Atlas North America, Inc.14
- Economic and Social Research Institute (Reston, Va.)13
- TomTom North America, Inc.13
- Geographic Data Technology, Inc. (GDT)11
- Tele Atlas B.V.11
- Tele Atlas North America, Inc./Geographic Data Technology, Inc.10
- Smithsonian Institution, Global Volcanism Program, National Atlas of the United States, and the United States Geological Survey7
- National Biodiesel Board4
- National Renewable Energy Laboratory (U.S.)3
- Tele Atlas (Firm : U.S.)3
- U.S. Census Bureau3