OS-01 SCEEP: Report on Economics of Environmental Protection for a Federal Oil Shale Leasing Program OS-01 SCEEP: Report on Economics of Environmental Protection for a Federal Oil Shale Leasing Program
SP-01 The Governor’s First Conference on Environmental Geology: Proceedings SP-01 The Governor’s First Conference on Environmental Geology: Proceedings, 1969
MIN-1936-01 Annotated Catalogue of Unpublished Engineering and Geological Reports on Mineral Resources of Colorado MIN-1936-01 Annotated Catalogue of Unpublished Engineering and Geological Reports on Mineral Resources of Colorado
B-13 Geology and Ore Deposits of the Platoro-Summitville Mining District B-13 Geology and Ore Deposits of the Platoro-Summitville Mining District
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-01-04 1877 Geologic Map of Colorado (Hayden) (detail) HM-01A Six 1877 Geologic Map Sheets and Two Cross Sections of Colorado (Hayden)