Mines and mineral resources. Colorado. Idaho Springs district History, mines; list.R.M. News. friar. 17, 1883 p.3 c.1 Rich strikes; activities, mines & companies; list. R.M. News. Mar. 18, 1883 p.3 c.3 Activities, Donaldson co. R.M. News. Mar. 21, 1883 p.6 c.3 Activities, mines; list. R.M. News. Mar. 22, 1883 p.3 c.l Rich strike, Standidge & co. Squirrel gulch. R.M. Nevis. Pear. 24, 1885 p.3 c.2
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