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- United States. Bureau of the Census. Geography Division22
- World Wildlife Fund14
- World Wildlife Fund (WWF)14
- Bay Area Open Space Council11
- Conservation Lands Network11
- GreenInfo Network (Firm)11
- San Francisco Bay Area Upland Habitat Goals Project11
- Environmental Systems Research Institute (Redlands, Calif.)4
- Geological Survey (U.S.)3
- Sacramento County GIS3
- Santa Clara Valley Water District (Calif.)3
- Canada Centre for Remote Sensing2
- Instituto Nacional de Estadística, Geografía e Informática (Mexico)2
- National Atlas of the United States2
- United States. Bureau of Transportation Statistics2
- California. Metropolitan Transportation Commission1
- Mirlou, Laurent1
- Rouet, Paul1
- United States. Environmental Protection Agency1
- von Dohlen, Jerry1