Born-Digital or AnalogAnalogTranscriptU.S. Geological survey. Colorado To undertake largest topographic map project ever undertaken here. Post, Jan. 12, 1936. p. 10 The work of the U.S.G.S. in Colorado 1945 - 1957. Mining yearbook 1958, P.33 How they make maps of Colorado terrain. Post Empire Aug- 5, 1962 p.8-9 Asks Congress for $5.7 million for research laboratories. Post Mar. 23, 1963 p.1CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
U.S. Geological survey. Colorado, [616554]. Denver Public Library Digital Collections, accessed 09/02/2026, https://digital.denverlibrary.org/nodes/view/1749898
