Born-Digital or AnalogAnalogTranscriptDuquesne smelter. Park county, Colorado Capacity; silver output, 1879. 1880 Activities, Fanny Barret ore. R. M. News. Jan. 18, 1880. p.3 c.4 Production, silver brick, Fannie Barret Mine* R. M. News. Feb. 8, 1880. p.8 0.4 Under construction. Transfer 1881CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
Duquesne smelter. Park county, Colorado, [228474]. Denver Public Library Digital Collections, accessed 09/02/2026, https://digital.denverlibrary.org/nodes/view/1502004
