Washington, DC: United States Geological Survey/USGS/Government Printing Office/GPO, 1971. Softcover. Item #46759
A descriptive report of the geology, mineral deposits, and mines in an area east of the Boulder batholith. 66 pages with maps, tables, references and index, plus the four folded map plates showing mines in the rear pocket. Bound in original stiff gray paper printed in black. A very good copy.