Interest rates for carriers : hearings before the Committee on Interstate Commerce, United States Senate, Sixty-eighth Congress, second session on S. 3772, a bill to authorize the reduction of and to fix the rate of interest to be paid by carriers upon notes or other evidences of indebtedness heretofore issued under the provisions of section 207 of the Transportation Act, 1920, or section 210 of said act as amended by an act approved June 5, 1920, January 14 and 15, 1925