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Collection place
- North America30 objects
- The Americas30 objects
- United States30 objects
- California26 objects
- San Francisco Bay Area, California22 objects
- Contra Costa County, California13 objects
- Unincorporated western Contra Costa County, California6 objects
- CA-CCo-138, Oakley, Contra Costa County5 objects
- CA-CCo-151, El Sobrante, Contra Costa County5 objects
- El Sobrante, Contra Costa County, California5 objects
- Lindsey Slough, Solano County, California5 objects
- Oakley, Contra Costa County, California5 objects
- Solano County, California5 objects
- CA-Sol-2, Solano County, California4 objects
- Churchill County, Nevada4 objects
- NV-Ch-35 (Humboldt Cave), Churchill County, Nevada4 objects
- Napa County, California4 objects
- Napa Valley, Napa County, California4 objects
- Nevada4 objects
- North Central California4 objects