611.013 C280 v.22 Ropes, Marian Wilkins Phagocytic activity and morphological variations of the ciliated epithelial cells of the trachea and bronchi in rabbits, by Marian W. Ropes with one plate. (In Carnegie of Wahington. Contributions to embryology. Washington, 1930. 29 x 23 cm vol. XXII, 77-90 [2] p. col. pl.) Contributions to embryology, no. 128 Bibliography: p. 90