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Spatial Coverage
- California[remove]12
- Berkeley1
- Berkeley (Calif.)1
- Grass Valley Mining District (Calif.)1
- Grass Valley Region1
- Grass Valley Region (Calif.)1
- Los Angeles1
- Los Angeles (Calif.)1
- Nevada City Mining District (Calif.)1
- Nevada City Region1
- Nevada City Region (Calif.)1
- Nevada County1
- Plumas County1
- Sierra County1
- Washington (State)1
