Mines and mineral resources. Colorado. Coal mining, Colo. Coal & Iron co. mines; list. Rep. Mar. 3, 1881 p.4 c.4 Companies incorporating; list. Republican . Mar. 4, 1881 p.2 c.2 Companies incorporating & filing articles; list. Rep. Mar. 11, 1881 p.2 c.3 Rep. Mar. 15, 1881 p.2 c.3 Report of Geologist. Rep. Mar. 16, 1881 p.8 c.2 Companies filing papers & incorporating; list. Rep. Mar. 17, 1881 p.7 c.l
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