En route air traffic control handbook.
Series: 7110.9C
Publisher: U.S. Dept. of Transportation, Federal Aviation Administration, Air Traffic Service : for sale by the Supt. of Docs., *U.S. Govt. Print. Off.
Published: 1974
Place of publication: [Washington]
Language: eng
Subjects: Air traffic control -- United States -- Handbooks, manuals, etc.
Notes: Loose-leaf for updating.