Renz, Otto, 1906- The Cretaceous ammonites of Venezuela / Otto Renz - Basel : Birkhauser Verlag, 1982 - 132 p. : ill., port, map. ; 31cm Includes bibliographical references LCCN: 82-014652 Subjects--Topical Terms: AmmonoideaPaleontology--CretaceousPaleontology--Venezuela