Born-Digital or AnalogAnalogTranscriptMastodon concentration works. San Juan co. COLORADO Machinery; process proved in tiermsay. ROM. -news. July 13, 1865 p.3 091 Closed for season. B.N. News. Nov. 22, 1885 p.19 c.2CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
Mastodon concentration works. San Juan co. COLORADO, [409000]. Denver Public Library Digital Collections, accessed 24/01/2026, https://digital.denverlibrary.org/nodes/view/1790231
