Mines and mineral resources. Colorado. Gilpin county Mines; gold shipment; companies; lists. R.M.News.Max.10,1880 p.2 c.2 Bonanza & Union tunnels: co's; mines; mills; list. R.M.News.Max.12,1880 p.3 c.1 Activities, Gold dirt dist. R.M.News.Mar.12,1880 p.8 c.3 Activities, mines; districts; list. R. M. News . hoax 14 1880 p.6 c.1 Activities, famous mines. lis^. R.M.Nevis.Max.18,1880 p.3 c.1
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