Verma, P.S. . Chordate Embryology / Textual Documents P.S. Verma, V.K. Agarwal and B.S. Tyagi. - 2nd ed. / - New Delhi : S. Chand & Co. Ltd. , 1976. - viii,383p. : ill ; 23cm . Subjects--Index Terms: Botany Chordate Embryology Zoology G-Botany Dewey Class. No.: 581.1512 / V 59 C