Washington, DC: United States Geological Survey/USGS/Government Printing Office/GPO, 1987. Softcover. Item #45812
Conatains a list of reports and maps published by the U.S. Geological Survey relating to the geology and mineral and water resources of Colorado. 344 pages with index. Bound in original light blue stiff paper covers printed in dark blue. Corner crease to the rear cover. A near fine copy.