Williams, Peter L. Basic human embryology [by] P.L. Williams, C.P. Wendell-Smith [and] Sylvia Treadgold. - Philadelphia, Lippincott [1966] - 136 p. illus. (part col.) 26 cm. Bibliography: p. 7. LCCN: 66004150 Subjects--Topical Terms: Embryology, Human. LC Class. No.: QM601 / .W5 1966a Dewey Class. No.: 612.64