611.013 C280 v.13 Wislocki, George Bernays, 1892- ....The distribution of mitochondria in the placenta. By G. B. Wislocki and J. A. Key. ( In Carnegie institution of Washington. Contributions to embryology . Washington, 1921. 29x23 cm . vol. XIII, p. 103-115.pl) Contribution to embryology no. 63 Bibliography: p. 115