Track stress research, November 1935-November 1938. Progress report ... India. Railway Department [from old catalog] Gelson, William Edward, 1899- [from old catalog] Blackwood, Edward Austin. [from old catalog] Railroad tracks. Strains and stresses. TF241 .I6 Calcutta, East India railway press, 1939. 1939. 1939 Text 2 v. eng