Aviation Safety and Noise Reduction Act of 1979 : hearings before the Subcommittee on Transportation and Commerce of the Committee on Interstate and Foreign Commerce, House of Representatives, Ninety-sixth Congress, first session on H.R. 3942, a bill to provide assistance to airport operators to prepare and carry out noise compatibility programs, to provide assistance to assure continued safety in aviation, and for other purposes, June 7, 12, and 27, 1979