Sehopper, Werner, 1899- The Walker rat carcinoma n2 72 in tissue culture, by Werner Schopper. With one plate. 611.013 (In Carnegie institution of Washington. C280 Contributions to embryology. Washington, V.25 1935. 29 x 23 vol. XXV, [l73 >181 [ 1 J p. pi.) Bibliography;-p. 181.