Boyd, James Dixon The development of the human caritid body;with six plates and one text-figure. 611.013 (In Carnegie institution of Washington.C280 Contributions to embryology. Wachington, 1937. v.26 29 x 23 cm. vol xxvi, 32 p. i illus. 6 pl.)Contributions to embryology. no 152. Descriptive letterpress en versos facing the plates. Bibliography: p. 30-31.