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Collection place
- California8 objects
- Contra Costa County, CaliforniaRemove constraint Collection place: Contra Costa County, California8 objects
- North America8 objects
- San Francisco Bay Area, California8 objects
- The Americas8 objects
- United States8 objects
- CA-CCo-141, Palm Tract, Contra Costa County6 objects
- Palm Tract, Contra Costa County, California6 objects
- Unincorporated eastern Contra Costa County, California6 objects
- Oakley, Contra Costa County, California2 objects
- CA-CCo-138, Oakley, Contra Costa County1 objects
- CA-CCo-139 (Simone Mound), Oakley, Contra Costa County1 objects