IS-26 Reconnaissance Study of Coal Fires in Inactive Colorado Coal Mines IS-26 Reconnaissance Study of Coal Fires in Inactive Colorado Coal Mines
IS-29 Snow and Avalanche: Colorado Avalanche Information Center Annual Report IS-29 Snow and Avalanche: Colorado Avalanche Information Center Annual Report, 1988-1989
IS-27 History of the Colorado Geological Survey (1872-1988) IS-27 History of the Colorado Geological Survey (1872-1988)
IS-28 Snow and Avalanche: Colorado Avalanche Information Center Annual Report IS-28 Snow and Avalanche: Colorado Avalanche Information Center Annual Report, 1987-1988
IS-25 Selected References on the Geology and Coal Resources of the Central and Western Colorado Coal Fields and Regions IS-25 Selected References on the Geology and Coal Resources of the Central and Western Colorado Coal Fields and Regions
IS-17 Geology and Resource Potential of Strategic Minerals in Colorado IS-17 Geology and Resource Potential of Strategic Minerals in Colorado
IS-12 Hydrogeologic and Stratigraphic Data Pertinent to Uranium Mining IS-12 Hydrogeologic and Stratigraphic Data Pertinent to Uranium Mining, Cheyenne Basin, Colorado
IS-13 Chemical Analyses of Water Wells in Selected Strippable Coal and Lignite Areas IS-13 Chemical Analyses of Water Wells in Selected Strippable Coal and Lignite Areas, Denver Basin, Colorado
IS-14 Hazardous Wastes in Colorado: A Preliminary Evaluation of Generation and Geologic Criteria for Disposal IS-14 Hazardous Wastes in Colorado: A Preliminary Evaluation of Generation and Geologic Criteria for Disposal
IS-15 Regulation of Geothermal Energy Development in Colorado IS-15 Regulation of Geothermal Energy Development in Colorado