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Collection place
- California191
- North America191
- The Americas191
- United States191
- San Francisco Bay Area, California161
- Contra Costa County, California160
- CA-CCo-138, Oakley, Contra Costa County156
- Oakley, Contra Costa County, California156
- North Central California30
- Northern California30
- San Joaquin County, California27
- CA-SJo-142, San Joaquin County, California13
- CA-SJo-68, San Joaquin County, California12
- Lake County, California3
- Byron Tract, Contra Costa County, California2
- CA-CCo-145, Byron Tract, Contra Costa County2
- CA-Lak-74, Lake County, California2
- CA-SJo-145, San Joaquin County, California2
- Lower Lake, Lake County, California2
- San Joaquin River Delta, Contra Costa County, California2