Collision avoidance : hearing before the Subcommittee on Transportation, Aviation and Materials of the Committee on Science, Space and Technology, U.S. House of Representatives, one hundredth Congress, first session, September 9, 1987.
United States.Congress.House.Committee on Science, Space, and Technology.Subcommittee on Transportation, Aviation, and Materials.
Washington : U.S.G.P.O.,
1988.
No. 67
Airplanes