Aircraft collision avoidance and air traffic safety : hearing before the Subcommittee on Transportation, Aviation and Materials of the Committee on Science and Technology, U.S. House of Representatives, Ninety-seventh Congress, first session, September 2, 1981
United States.Congress.House.Committee on Science and Technology.Subcommittee on Transportation, Aviation and Materials.
Washington U.S.G.P.O.
1982
No. 97-52
Airplanes