AMERICAN TRIASSIC COILED NAUTILOIDS: PROFESSIONAL PAPER 250
Washington, DC: United States Geological Survey/USGS/Government Printing Office/GPO, 1953. Soft cover. A study of the classification and evolution of late Paleozoic and early Mesozoic cephalopods, and description of new species. 104 pages with tables, illustrations and index plus nineteen photographic plates bound in the rear. Bound in original gray stiff..... More