TY - BOOK AU - Barnes,Robert D. TI - Invertebrate zoology SN - 0721615627 U1 - 592 BAR PY - 1974/// CY - Philadelphia : PB - Saunders Company KW - The origin of the metazoa KW - Principles of paleobotany KW - Modern Biology KW - Animal Diversity N1 - Includes index. ER -