RS-05 Coal Resources of the Denver and Cheyenne Basins RS-05 Coal Resources of the Denver and Cheyenne Basins, Colorado
RS-04 Proceedings of the Second Symposium on the Geology of Rocky Mountain Coal RS-04 Proceedings of the Second Symposium on the Geology of Rocky Mountain Coal, 1977
RS-01 Geology of Rocky Mountain Coal: A Symposium RS-01 Geology of Rocky Mountain Coal: A Symposium, 1976
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
HM-01-04 1877 Geologic Map of Colorado (Hayden) (detail) HM-01A Six 1877 Geologic Map Sheets and Two Cross Sections of Colorado (Hayden)
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)
HM-01-17 1877 Geologic Map HM-01-17 1877 Geologic Map, Sheet XVII: Geologic Cross Sections of the Front Range and Central CO (Hayden)