Civil air policy : hearings before a subcommittee of the Committee on Interstate and Foreign Commerce, House of Representatives, Eighty-fourth Congress on H.R. 4648 and H.R. 4677, bills to amend the Civil Aeronautics Act of 1938, as amended, and for other purposes : H.R. 8902 and H.R. 8903, bills to amend subsection 406 (b) of the Civil Aeronautics Act of 1938, as amended, March 18 and July 22, 1955 (before entire committee), January 17, 18, 19, 20, February 9, 10, 28, 29, March 2, April 18, and 20, 1956 (before Subcommittee on Transportation and Communications).