Editore: United States Geological Survey., 1968
Da: Eryops Books, Stephenville, TX, U.S.A.
No Binding. Condizione: Very Good. Two (2) Large folded sheets consisting of a geologic map superposed on topographic contours, three cross-sections, a columnar section with description of units, a large folded map showing location of thorium deposits and associated radioactivity, and a 5-page discussion of geology and economic geology, and references cited; in printed envelope; ex-corporate library; in very good condition. Map.