HM-04 1913 Topographic Map of Colorado (George) (detail) HM-04 1913 Topographic Map of Colorado (George)
B-04 Geology and Ore Deposits of the Monarch District and Tomichi Districts B-04 Geology and Ore Deposits of the Monarch District and Tomichi Districts, Colorado
B-06 Common Minerals and Rocks: Their Occurrence and Uses B-06 Common Minerals and Rocks: Their Occurrence and Uses (1913)
GEO-1912-01 Biographical Memoir of Samuel Franklin Emmons 1841-1911 GEO-1912-01 Biographical Memoir of Samuel Franklin Emmons 1841-1911
B-03 Geology and Ore Deposits of the Alma District B-03 Geology and Ore Deposits of the Alma District, Park County, Colorado
B-01 A Preliminary Report on the Geology of the Monarch Mining District B-01 A Preliminary Report on the Geology of the Monarch Mining District, Chaffee County, Colorado
B-02 Geology of the Grayback Mining District B-02 Geology of the Grayback Mining District, Costilla County, Colorado
GEO-1886-01 Geology and mining Industry of Leadville GEO-1886-01 Geology and Mining Industry of Leadville, Colorado with Atlas
MI-19 Nell’s Topographical and Township Map of the State of Colorado (detail) MI-19 Nell’s Topographical and Township Map of the State of Colorado
HM-01-18 1877 Geologic Map HM-01-18 1877 Geologic Map, Sheet XVIII: Geologic Cross Sections of the Western Slope and Central CO (Hayden)