IS-42 Colorado Minerals and Mineral Fuel Activity IS-42 Colorado Minerals and Mineral Fuel Activity, 1996
IS-43 Snow and Avalanche: Colorado Avalanche Information Center Annual Report IS-43 Snow and Avalanche: Colorado Avalanche Information Center Annual Report, 1996-1997
IS-40 Colorado Minerals and Mineral Fuel Activity IS-40 Colorado Minerals and Mineral Fuel Activity, 1995
IS-41 Active Permitted Mine Operations in Colorado IS-41 Active Permitted Mine Operations in Colorado, 1995-96
IS-39 Colorado Mineral and Mineral Fuel Activity IS-39 Colorado Mineral and Mineral Fuel Activity, 1994
IS-37 Water Resources Beneath State Lands in Part of T. 16 S. IS-37 Water Resources Beneath State Lands in Part of T. 16 S., R. 63 W., Black Squirrel Creek Basin, El Paso County, Colorado
IS-35 Selected References Related to Coalbed Methane in the Greater Green River IS-35 Selected References Related to Coalbed Methane in the Greater Green River, Piceance, Powder River, Raton and San Juan Basins
IS-36 Snow and Avalanche: Colorado Avalanche Information Center Annual Report IS-36 Snow and Avalanche Annual Report 1991-92 CAIC
IS-34 Snow and Avalanche: Colorado Avalanche Information Center Annual Report IS-34 Snow and Avalanche Annual Report 1990-91 CAIC
IS-30 Bibliography and Index of Colorado Geology IS-30 Bibliography and Index of Colorado Geology, 1984-1989
IS-31 Snow and Avalanche: Colorado Avalanche Information Center Annual Report IS-31 Snow and Avalanche: Colorado Avalanche Information Center Annual Report, 1989-1990
IS-32 Coalbed Methane Development in Colorado IS-32 Coalbed Methane Development in Colorado, September 1990