Imlay, Ralph Willard 1908-1989 Middle bajocian ammonites from the cook inlet region Alaska / by Ralph W. Imlay. -- Washington : United States Government Printing Office, 1964 - 61 p., [29] h. de lam. -- (Geological Survey Professional Paper ; 418-B). Subjects--Topical Terms: AlaskaAmonites fósiles Universal Decimal Class. No.: 564.53(798)