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- Gold mines and mining[remove]33
- Miners18
- Gold discoveries13
- Gold miners10
- Mines and mineral resources6
- Chinese2
- Gambling2
- Gold panning2
- Hydraulic mining2
- Indians of North America2
- Mineral industries2
- Social conditions2
- African Americans1
- Banks and banking1
- Chaparral1
- Copper mines and mining1
- Diversion structures (Hydraulic engineering)1
- Fortification1
- Frontier & pioneer life1
- Frontier and pioneer life1
