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(*AERIAL RECONNAISSANCE
2
(*SEA ICE
2
FREEZING
GREENLAND SEA
2
ICE ISLANDS
2
Ice and Permafrost
2
MELTING
2
METEOROLOGICAL RADAR
SEA ICE)
2
Snow
2
*ARCTIC OCEAN)
1
*BIRDS EYE PROJECT
1
*POLYNYAS
1
AERIAL PHOTOGRAPHS
1
ALASKA
1
ARCTIC OCEAN
1
ARCTIC REGIONS)
1
BIRDS EYE 3 PROJECT(1969)
1
DATA ACQUISITION
1
DATA PROCESSING
1
DENMARK
1
FLETCHER'S ICE ISLAND
1
FLIGHT PATHS
1
FRANZ JOSEF LAND
1
GREENLAND
1
Meteorology
1
OBSERVATION AIRCRAFT
1
POLAR REGIONS
1
Physical and Dynamic Oceanography
1
RADAR IMAGES
1
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