TY - BOOK TI - Smithsonian contributions to paleobiology VL - no.67 (1989) UR - https://www.biodiversitylibrary.org/item/266376 PB - Smithsonian Institution Press CY - Washington PY - 1989 SN - 0081-0266 SN - 1943-6688 N1 - Biological abstracts | 0006-3169 AU - Smithsonian Institution KW - Paleobiology ER -