Editore: U. S. Department of the Interior, Washington, DC, 1936
Da: Willis Monie-Books, ABAA, Cooperstown, NY, U.S.A.
Softcover. Condizione: Good. Lacks covers. Slight stain on last (blank) page. Owner's name ink stamped on upper margin of title page. ; Geological Survey Bulletin 886-A. Contributions to Economic Geology, 1937, pages 1-4.; 4 pages.