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(*SEA ICE
2
GREENLAND SEA
2
Ice and Permafrost
Physical and Dynamic Oceanography
Snow
2
(*AERIAL RECONNAISSANCE
1
*ARCTIC OCEAN)
1
*POLYNYAS
1
*SOUND TRANSMISSION)
1
ATTENUATION
1
BIRDS EYE 3 PROJECT(1969)
1
DATA ACQUISITION
1
DATA PROCESSING
1
FRANZ JOSEF LAND
1
FREEZING
1
GREENLAND
1
ICE ISLANDS
1
MELTING
1
METEOROLOGICAL RADAR
1
OBSERVATION AIRCRAFT
1
POLAR REGIONS
1
REFRACTION
1
SEA ICE)
1
SEA WATER
1
UNDERWATER SOUND
1
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