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2008. Bay Area Open Space Council, Conservation Lands Network, San Francisco Bay Area Upland Habitat Goals Project, GreenInfo Network (Firm), U.S. Fish and Wildlife Service, and Dr. Robert F. Holland. This polygon shapefile depicts existing vernal pool complexes, not individual vernal pools, in the nine county San Francisco Bay Area Region, Calif... Bay Area Open Space Council.
2020. Placer County Geographic Information Systems. This polygon shapefile represents vernal pool complexes in west Placer County, California. The complexes were originally digitized from earial phot... Placer County Geographic Information Systems.