Proceedings of the twenty-eighth annual meeting - Highway Research Board : held at Washington, D.C., December 7 - 10, 1948

Crum, Roy W. | TIBKAT | 1949

Proceedings of the twenty-seventh annual meeting - Highway Research Board : held at Washington, D.C., December 2 - 5, 1947

Crum, Roy W. | TIBKAT | 1948

Proceedings of the twenty-sixth annual meeting - Highway Research Board : held at Washington, D.C., December 5 - 8, 1946

Crum, Roy W. | TIBKAT | 1947

Proceedings of the twenty-ninth annual meeting - Highway Research Board : held at Washington, D.C., December 13- 16, 1949

Crum, Roy W. | TIBKAT | 1950

Proceedings of the tenth annual meeting of the Highway Research Board, held at Washington, D.C., December 11 - 12, 1930

Crum, Roy W. | TIBKAT | 1931