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AERIAL RECONNAISSANCE
Ice and Permafrost
3
Snow
3
*ANTARCTIC REGIONS
2
*ARCTIC REGIONS
2
*SEA ICE
2
AREA COVERAGE
2
Cartography and Aerial Photography
2
FILES(RECORDS)
2
(*SEA ICE
1
(*WEATHER FORECASTING
1
*AERIAL PHOTOGRAPHS
1
*ARCTIC REGIONS)
1
*MICROFILM
1
*POLAR REGIONS
1
*SCIENTIFIC SATELLITES
1
AERIAL PHOTOGRAPHS
1
ARCTIC OCEAN
1
CRACKS
1
FLIGHT PATHS
1
FORECASTING
1
FREEZING
1
ICE FORECASTING
1
ICE ISLANDS
1
Information Science
1
MCMURDO SOUND
1
MELTING
1
METEOROLOGICAL PHENOMENA
1
METEOROLOGICAL SATELLITES
1
MICROFILM
1
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