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Publicado por United States Geological Survey., 1978
Librería: Eryops Books, Stephenville, TX, Estados Unidos de America
No Binding. Condición: Very Good. Large folded sheet consisting of geologic map superposed on topographic contours, two cross-sections, chart showing correlation of units, columnar section with description of stratigraphic units, explanation of economic geology, table summarizing mines, prospects and main mineral occurrences, and references cited; in printed envelope; ex-corporate library; in very good condition. Map.