HM-01-04 1877 Geologic Map of Colorado (Hayden) (detail) HM-01-04 1877 Geologic Map of Colorado (Hayden)
IS-21 Bibliography and Index of Colorado Geology IS-21 Bibliography and Index of Colorado Geology, 1983
OF-15-11 Geology and Groundwater Resources of Park County OF-15-11 Geology and Groundwater Resources of Park County, Colorado
OF-15-10 Geology and Groundwater Resources of Douglas County OF-15-10 Geology and Groundwater Resources of Douglas County, Colorado
OF-78-08 Location Map of Drill Holes Used for Coal Evaluation in the Denver and Cheyenne Basins OF-78-08 Location Map of Drill Holes Used for Coal Evaluation in the Denver and Cheyenne Basins, Colorado