Born-Digital or AnalogAnalogTranscriptOntario mine. Blue river district colorado Description; ore specimens, National. exposition., Denver. R. 11. News. Aug. 1, 1882 p.3 c.4 Ore exhibit, Denver exposition. R. M. News. July 17, 1883 p.2 c.6CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
Ontario mine. Blue river district colorado, [467564]. Denver Public Library Digital Collections, accessed 13/04/2026, https://digital.denverlibrary.org/nodes/view/1626453
