Procedures for air navigation services : ICAO abbreviation and codes.
International Civil Aviation Organization.
Montréal, Québec, Canada : International Civil Aviation Organization,
2004.
"This edition incorporates all amendments approved by the Council prior to 7 May 2004  and supersedes, on 25  November 2004, all previous editions of PANS-ABC (Doc 8400)."
Aeronautics
Aeronautics
Aeronautics, Commercial