Description based on: Vol. 29 (Apr. 1981)None published, 1994.Kept up to date between issues by quarterly amendments.Mode of access: Internet.Vols. for 19 -Feb. 1958 issued by: U.S. Dept. of Commerce, Civil Aeronautics Administration; Aug. 1960-19 by: Federal Aviation Agency; 19 -19 by: the National Flight Data Center; <Apr. 1981>-19 by: the Federal Aviation Administration; <Apr. 1991>-Apr. 1992 by: the Air Traffic Rules and Procedures Service; Apr. 1993-199 by: the Air Traffic Rules and Procedures Service, Air Traffic Publications Branch; <1997-> by: Federal Aviation Administration, Air Traffic Airspace Management Program, Air Traffic Publications Branch.Continued by online database version.Complemented by: International notices to airmen,...