CONTRIBUTIONS TO ECONOMIC GEOLOGY (SHORT PAPERS AND PRELIMINARY REPORTS) 1925; PART I, METALS AND NONMETALS EXCEPT FUELS: GEOLOGICAL SURVEY BULLETIN 780
Washington, DC: United States Geological Survey/USGS/Government Printing Office/GPO, 1926. Soft cover. 165 pages with maps, foldouts, photographs and index and the required eight maps in the rear pocket. A very good plus copy. More