Gaya APA
ICAO, . (1953).
CIRCULAR 35-AN/30 NORTH ATLANTIC TRIAL OF AN AUGMENTED PROGRAMME OF UPPER AIR OBSERVATIONS .
Canada:
ICAO.
Gaya MLA
ICAO, .
"CIRCULAR 35-AN/30 NORTH ATLANTIC TRIAL OF AN AUGMENTED PROGRAMME OF UPPER AIR OBSERVATIONS".
Canada:
ICAO,
1953.
Text.