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- Bay Area Open Space Council6
- Canada Centre for Remote Sensing1
- Circuit Rider Productions4
- Conservation Lands Network6
- Environmental Systems Research Institute (Redlands, Calif.)4
- Garcia, Paul1
- Geological Survey (U.S.)2
- GreenInfo Network (Firm)6
- Instituto Nacional de Estadística, Geografía e Informática (Mexico)1
- Mirlou, Laurent1
- National Atlas of the United States3
- Price, Matt1
- Sacramento County GIS2
- San Francisco Bay Area Upland Habitat Goals Project6
- Santa Clara Valley Water District (Calif.)2
- United States. Bureau of Transportation Statistics1
- United States. Bureau of the Census. Geography Division21
- United States. Environmental Protection Agency1
- World Wildlife Fund14
- von Dohlen, Jerry5