Air safety : hearings before a subcommittee of the Committee on Interstate and Foreign Commerce, United States Senate, Eightieth Congress, first session on S. 3, a bill to provide for the training of air-traffic control-tower operators : S. 4, a bill authorizing the advanced training in aeronautics of technical personnel of the Civil Aeronautics Administration, and S. 269, a bill to create an independent Air Safety Board, January 28, 29, 30, February 3, 4, 5, 6, 7, 1947.

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