Born-Digital or AnalogAnalogTranscriptGilpin county tunnel. Black Hawk district . Colorado . Silver ore discovery. , 1868.p.4 e.3 Activities; production. R. M. News. Oct. 27, 1868.p.4 c.2 Transfer; activities. R. M. News. Nov. 5, 1868. p.4 c.3 R. M. News. Nov. 6, 1868. p.l c.2 Production; assays. R. M. News. June 19, 1869.p.4 c,.2CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
Gilpin county tunnel. Black Hawk district . Colorado, [272510]. Denver Public Library Digital Collections, accessed 19/05/2025, https://digital.denverlibrary.org/nodes/view/1476220
