Manual of teletypewriter operating practices,
International Civil Aviation Organization.
[Montreal]
1963.
Doc 7946-AN/868/3.
This edition incorporates all amendments adopted by the Council prior to 1 November 1963 and supersedes, on 1 November 1963, all previous editions of Doc 7946-AN/868.
Contains Amendments no. 1-2.
Aeronautics
Teletype in aeronautics.