Developing the next generation air traffic management system : hearing before the Subcommittee on Space and Aeronautics, Committee on Science, House of Representatives, One Hundred Seventh Congress, first session, July 19, 2001.
Developing the next generation air traffic management system : hearing before the Subcommittee on Space and Aeronautics, Committee on Science, House of Representatives, One Hundred Seventh Congress, first session, July 19, 2001.