Born-Digital or AnalogAnalogTranscriptMilling. Colorado Description of ore sorting. R. M. News. Sept. 13, 1879.p.4 c.3 Counties; list; activities. R. M. News. blay 4, 1868. p.l c.3 Copper treatment, Hill & Dixon mills. Gold mining--old andN new. process ss2' 1881 p.4c.4 R. M. News. July 2, 1867. p.l c.4 Activities; processes; companies; list. R. M. News. July 3, 1867. p.2 c.lCollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
