MACINTYRE, David H. Cretaceous and Lower TertiaryStratigraphy in Northwestern Puerto Rico / By David H. McIntyre, JOhn M. Aaron and Othmar T. Tobisch. -- Washington : United States Government Printing Office, 1970 - 16 p. -- (Geological Survey Bulletin ; 1294-D). Fecha real de registro 06-04-1970 Subjects--Topical Terms: CretácicoEstratigrafíaPuerto RicoTerciario Universal Decimal Class. No.: 551.763(729.5)