PEGMATITE INVESTIGATIONS, 1942-1945, BLACK HILLS, SOUTH DAKOTA: PROFESSIONAL PAPER 247
Washington, DC: United States Geological Survey/USGS/Government Printing Office/GPO, 1953. Soft cover. Descriptions, maps, and diagrams of deposits of mica, beryl, lithium, tantalum, tin, and feldspar. 228 pages with maps, mines and claims, mine logs and index. All forty-five folded plates are in the rear pocket. Bound in original gray stiff..... More




