Pérez-Guzman, Ana María Radiolarian biostratigraphy of the Late Miocene in Baja California and the Tres Marias Islands, Mexico - New York Micropaleontology Press 1985 - pp. 320-334 ISSN: 0026-2803 Subjects--Topical Terms: MIOCENOPALEONTOLOGÍARADIOLARIA Subjects--Geographic Terms: ESTADOS UNIDOS