Mines & mineral resources, Colorado Silver discovery, Gunnison river bank. R. M. News. Jan. 13, 1875 p.4 c.1 Daily production, Ralston coal company. R. M. News. Jan. 13, 1875 p.4 c.1 Black lead discovery, Raton mountains. R. 11. News. Jan. 13, 1875 p.4 c.3 Report, mineral production; placer & gulch mining, dints., list, 1872-1874. R. M. News. Jan. 23, 1875 p.2 c.1 Las Animas Valley & San Juan min. & Turnpike co. inc. R. M. News. Jan. 23, 1875 p.4 c.1
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