B-20 Preliminary Notes on the Revision of the Geological Map of Eastern Colorado B-20 Preliminary Notes on the Revision of the Geological Map of Eastern Colorado
B-19 The Cretaceous Formations of the Northeastern Colorado Plains and the Foothills Formations of North-Central Colorado B-19 The Cretaceous Formations of the Northeastern Colorado Plains and the Foothills Formations of North-Central Colorado
B-12 Common Minerals and Rocks: Their Occurrence and Uses B-12 Common Minerals and Rocks: Their Occurrence and Uses (1917)
B-09 Geology of Ore Deposits of the Bonanza District B-09 Geology of Ore Deposits of the Bonanza District, Saguache County, 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
GEO-1886-01 Geology and mining Industry of Leadville GEO-1886-01 Geology and Mining Industry of Leadville, Colorado with Atlas
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)