Born-Digital or AnalogAnalogTranscriptMammoth cave mine. Rock creek district colorado Exhibit, National exposition Denver. R. M. News. Sept. 4, 1882 p.8 c.4 Ore exhibit, Denver exposition. R. P:. News. Sept. 19, 1883 p.2 c.1CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
Mammoth cave mine. Rock creek district colorado, [402825]. Denver Public Library Digital Collections, accessed 16/11/2025, https://digital.denverlibrary.org/nodes/view/1784054
