Born-Digital or AnalogAnalogTranscriptCoal - San Juan region, Colorado Deposits; consumption; smelter; districts list R. M. News. 3une 23, 1877 p.4 c.4 Extension deposits. R. DI. News. Feb. 4, 1881 p.5 c.1 Coal deposits; coking ovens. R. M. News. Feb. 35, 1881 p.2 c.4 IsCollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
Coal - San Juan region, Colorado, [181630]. Denver Public Library Digital Collections, accessed 16/07/2025, https://digital.denverlibrary.org/nodes/view/1525839
