Mines and mineral resourceS. COLORADO EL Moro DISTRICT Coke shipments to Leadville. R.M.News.J an.1,1880 p.6 c.2 Coke; coal; production; ovens; yield; shipments; transportation. R. M. News. Mar.6,1880 p.8 c.5 Coal & coke statistics; Hollander colonists refuse work. RJI.News.lfay 20,1880 p.8 c.4
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