Contributions to embryology. - Washington, D.C. : Carnegie Institution of Washington, 1949- - v. : ill. ; 29 cm. - Nine times a year - v. 33, no. 213, 1949 Latest issue consulted:Vol. 33, no.221, 1949 Subjects--Topical Terms: Embryology. National Library of Medicine Call No.: W1 / CO778R 1915