THE TWENTYMILE PARK DISTRICT OF THE YAMPA COAL FILED, ROUTT COUNTY, COLORADO; GEOLOGICAL SURVEY BULLETIN 748
Washington, DC: United States Geological Survey/USGS/Government Printing Office/GPO, 1923. Soft cover. 82 pages with maps, photographic plates, sectional charts and tables, plus large folded map in the rear pocket. Bound in the standard original gray stiff paper printed in black. A very good plus copy. More