Mines mineral resources Colorado Rico district Activities, mines; companies; list; erection of lixivation works. Republican denver Jan. 27, 1882 p.4 c.4 Newman group activities, mines; list; Rico mining. & milling assoc. mines; list. Rep. Feb. 13, 1882 p.6 c.3 Lixivation works; capacity; article, "Rico." Rep. Mar. 15, 1882 p.6 c.l Activities, mines; list. Rep. Mar. 30, 1882 p.6 c.l-3 Activities, mines; companies; list. Rep. Mar. 31, 1882 p.6 c.l Activities, mines; list. Rep. Apr. 3, 1882 p.6 c.l
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