Aircraft collision avoidance : hearings before the Subcommittee on Transportation, Aviation, and Communications of the Committee on Science and Technology, U.S. House of Representatives, Ninety-sixth Congress, first session, June 27, 28, July 24, 1979.
United States.Congress.House.Committee on Science and Technology.Subcommittee on Transportation, Aviation, and Communications.
Washington : U.S. Govt. Print. Off.,
1979.
"No. 29."
Airplanes