Born-Digital or AnalogAnalogTranscriptmines mineral resources colorado san juan region Mica discoveries and its uses. R. Y. News. Apr. 26, 1877 p.2 c.3 Mica mines. R. 1?. News. Apr. 27, 1877 p.4 c.1 Thayer's map on sale, Denver. R. &I. News. Ray 4, 1877 p.4 c.1 tirticle, by Engineering & mining Journal. R. M.. News. R"ay 11, 1877 p.2 c.3 Activities, mines; list, Summit district. R. M. News. May 11, 1877 p.4 c.4 Descriptive sketch of lodes; districts; list. R. P.". News. May 16, 1877 p.4 c.4CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
mines mineral resources colorado san juan region, [434311]. Denver Public Library Digital Collections, accessed 15/10/2026, https://digital.denverlibrary.org/nodes/view/1427510
