American men of science : a biographical directory - 10th ed. (1960-1961); v. 03

American men of science : a biographical directory - 10th ed. (1960-1961); v. 05

American men of science : a biographical directory - 10th ed. (1960-1961); v. 01

American men of science : a biographical directory - 10th ed. (1960-1961); v. 02