(1957). Helicopter operations in east Greenland, 1956. Polar Record, 8(57), 520.
Chicago Style (17th ed.) Citation"Helicopter Operations in East Greenland, 1956." Polar Record 8, no. 57 (1957): 520.
MLA (9th ed.) Citation"Helicopter Operations in East Greenland, 1956." Polar Record, vol. 8, no. 57, 1957, p. 520.
Warning: These citations may not always be 100% accurate.