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

Name: Proceedings of the twenty-ninth annual meeting : held at Washington, D.C., December 13-16, 1949
Author: Crum, Roy W., Burggraf, Fred, Carey, W. N., National Research Council (U.S.). Division of Engineering and Industrial Research, National Research Council (U.S.). Highway Research Board