Subject
Gold mines and mining History
Georgetown (Colo.) History
2
Silver mines and mining History
2
Colorado Gold discoveries
1
Extinct cities
1
Gold industry History
1
Gold miners History
1
Gold panning
1
Historic preservation
1
Mineral industries History
1
Miners Labor unions History
1
Mines and mineral resources History
1
Placer mining
1
Prospecting
1
Tincup (Colo.) History
1
Tourism
1