TY  - BOOK
ED  - International Civil Aviation Organization(Canada)
TI  - Communication procedures (COM)
U1  - 629.125 
PY  - 1947///
CY  - Canada
PB  - ICAO
KW  - Navigation (Acronautics)
KW  - Aeronautics
KW  - Communication systems
N1  - Text in English, Spanish and French
ER  -