mines mineral resources colorado san juan region New colonization scheme; highway. R. M. News. Yar. 18, 1876 p.4 c.2 Ore shipments to Pueblo steel works. R.M.News.New Yrs.Ed.Jan.1881 p.19 c.4 Prospecting & development, 1880. R.M.News.New Yrs.Ed.Jan.1881 p.8 c.3 Early history; coal. R.M.News.New Yrs.Ed.lan.1881 p.7 c.6 Railroad advantage to mining. R.M.News.New Yrs.Ed.Jan.1881 p.6 c.3 Prospecting, about 1867. R.M.Newsajew Yrs.Ed.Jan.1881 p.7 c.2
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