THE TWENTYMILE PARK DISTRICT OF THE YAMPA COAL FILED, ROUTT COUNTY, COLORADO; GEOLOGICAL SURVEY BULLETIN 748. Marius R. Campbell.

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. Softcover. Item #43649

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.

Price: $20.00