Mines & mineral resources, Colorado. Boulder county Activities, Grand Island & Ward districts. R. V. News. Apr. 25, 1872 p.l c.3 Activities; prospecting; development, Gold Hill district. R. M. News. Apr. 27, 1872 p.l c.5 Discovery; yield, on Pumpkin ridge. R. M. News. Apr. 7, 1880 p.8 c.3 Mines; list; transfers; mills; activities, at Crisman camp. R. A-?. News. Sept. 19,1880 p.7 c.4 Incorporations; list. R. M. News. Sept. 21,1880 1.4 c.3
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