Born-Digital or AnalogAnalogTranscriptMines & mineral resources, Colorado Edison invention for extracting gold from tailings. R. 111. News. Apr. 7, 1880 p.8 c.1 Strikes; assays, Chalk mountain. R. flT. News. Apr. 7, 1880 p.8 c.3 Map for sale; mining districts; list. R. IV. News. Apr. 17, 1880 p.8 c.3 Agency needed for grub-staking and fitting out prospectors. R. 2k. News. Apr. 18, 1880 p.4 c.1CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
Mines & mineral resources, Colorado, [423120]. Denver Public Library Digital Collections, accessed 09/12/2025, https://digital.denverlibrary.org/nodes/view/1798875
