Washington : U.S. Govt. Print. Off., 1942.
xi, 513 pages : including illustrations (maps) tables, diagrams ; 29 cm
"Includes ... a summary report of findings and recommendations prepared by Dr. Ralph J. Watkins, director of the study ... and a series of staff and agency contributions prepared by a group of specialists from both within and without the government."--Letter of transmittal. Letter of transmittal signed: Owen D. Young, chairman, Advisory committee for the transportation study. Issued also as House doc. 883, 77th Cong., 2d sess.