Born-Digital or AnalogAnalogTranscriptmines mineral resources colorado san juan county Survey of decline of mining operations during 1958 in Silverton area. Mining Yearbook, 1959 P.97 Standard Metals Corporation opens reduction mill at Silverton. Post Aug. 26, 1962 p.6D Geology, active mines, milling. Engineering and Mining Journal Aug., 1935CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
mines mineral resources colorado san juan county, [434178]. Denver Public Library Digital Collections, accessed 24/03/2025, https://digital.denverlibrary.org/nodes/view/1427228
