Protocol relating to an amendment to the Convention on International Civil Aviation (Article 50a) signed at Montreal on 26 October 1990 = Protocole portant amendement de la Convention relative à l'aviation civile internationale (article 50a) signé à Montréal le 26 October 1990.
International Civil Aviation Organization.
Montreal : International Civil Aviation Organization,
1990.
Cover title.
English, French, Russian or Spanish.
International Civil Aviation Organization.
Aeronautics, Commercial