To establish a National air policy board hearings before a subcommittee of the Committee on Interstate Commerce, United States Senate, Seventy ninth congress, second session, on S. 1639, a bill to amend the Transportation act of 1940 so as to establish a National air policy board, and for other purposes . May 21, 27, 28, 29, June 3, 4, 5, and 6, 1946.

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