Born-Digital or AnalogAnalogTranscriptBillings tunnel. Gilpin co. colorado Exhibit, National exposition., Denver. R. DH. News. Sept. 16,1882 p.3 c.2 Developments, vaIley view min. co. R. M. News. 0 ct. 29, 1881 p.2 c.3 0CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
