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Spatial Coverage
- California[remove]34
- Nevada County5
- Nevada4
- Nevada County.3
- San Francisco Bay Area (Calif.)3
- California, Northern2
- California.2
- Grass Valley Region2
- Grass Valley Region (Calif.)2
- Nevada County (Calif.)2
- San Francisco Bay Area2
- Alpine County1
- Alpine County (Calif.)1
- Grass Valley Mining District (Calif.)1
- Grass Valley Region.1
- Inyo County1
- Madera County1
- Madera County (Calif.)1
- Mother Lode Region1
- Mother Lode Region (Calif.)1
