Communication procedures (COM) / 
 Procedures pour les communications 
International Civil Aviation Organization 
 - Canada :  ICAO,  1947 
 - 42 p. ;  27 cm. 
 - Procedures for air novigation serivices .
<br/><br/> Text in English, Spanish and French 
<br/><br/><label>ISBN: </label> USD 25 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Navigation (Acronautics)<br/>Aeronautics--Communication systems
<br/><br/><label>Dewey Class. No.: </label>629.125