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Collection place
- California191 objects
- North America191 objects
- The Americas191 objects
- United States191 objects
- San Francisco Bay Area, California187 objects
- Contra Costa County, California124 objects
- Unincorporated western Contra Costa County, California66 objects
- CA-CCo-151, El Sobrante, Contra Costa County61 objects
- El Sobrante, Contra Costa County, California61 objects
- CA-CCo-138, Oakley, Contra Costa County58 objects
- Oakley, Contra Costa County, California58 objects
- Lindsey Slough, Solano County, California37 objects
- Solano County, California37 objects
- CA-Sol-2, Solano County, California35 objects
- Lower Napa Valley, Napa County, California17 objects
- Napa County, California17 objects
- Napa Valley, Napa County, California17 objects
- CA-Nap-14 (Las Trancas site), Napa Valley, Napa County9 objects
- CA-Nap-16, Napa Valley, Napa County8 objects
- Alameda County, California5 objects