Washington, DC: United States Geological Survey/USGS/Government Printing Office/GPO, 1957. Soft cover. Item #48517
A description of the Tertiary stratigraphy and reserves of coal in the Wasatch and Fort Union formations in 24 townships in northern Wyoming. 83 pages with tables and index. All eleven of the required folded plates are present in the rear pocket. Bound in original gray stiff paper covers printed in black. Toning to the covers along the spine. A very good copy.