IS-54 Colorado Mineral and Mineral Fuel Activity IS-54 Colorado Mineral and Mineral Fuel Activity, 1999
IS-56 Snow and Avalanche: Colorado Avalanche Information Center Annual Report 1999-2000 IS-56 Snow and Avalanche: Colorado Avalanche Information Center Annual Report 1999-2000
IS-49 Reconnaissance Field Investigation of Surface-Water Specific Conductance in the Snowmass-Glenwood Springs Area IS-49 Reconnaissance Field Investigation of Surface-Water Specific Conductance in the Snowmass-Glenwood Springs Area, West-Central Colorado
IS-50 Oil and Gas Fields of Colorado Statistical Summary through 1996 IS-50 Oil and Gas Fields of Colorado Statistical Summary through 1996
IS-52 Colorado Mineral and Mineral Fuel Activity IS-52 Colorado Mineral and Mineral Fuel Activity, 1998
IS-53 Snow and Avalanche: Colorado Avalanche Information Center Annual Report 1998-1999 IS-53 Snow and Avalanche: Colorado Avalanche Information Center Annual Report 1998-1999
IS-44 Colorado Mineral and Mineral Fuel Activity IS-44 Colorado Mineral and Mineral Fuel Activity, 1997
IS-45 Active Permitted Mine Operations in Colorado IS-45 Active Permitted Mine Operations in Colorado, 1996-1997
IS-46 Snow and Avalanche: Colorado Avalanche Information Center Annual Report IS-46 Snow and Avalanche: Colorado Avalanche Information Center Annual Report, 1997-1998
IS-47 Geologic Hazards Avoidance or Mitigation: A Comprehensive Guide to State Statutes IS-47 Geologic Hazards Avoidance or Mitigation: A Comprehensive Guide to State Statutes, Land Use Issues and Professional Practice in Colorado