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ANTARCTIC REGIONS
GREENLAND
Ice and Permafrost
4
Snow
4
(*GLACIERS
3
(*ICE
2
DEPTH FINDING
2
ICE
2
RADAR REFLECTIONS
2
(*SNOW
1
(*SURVEYING(GEOGRAPHIC)
1
*POLAR REGIONS)
1
54 ENVIRONMENTAL SCIENCES
1
AERIAL PHOTOGRAPHS
1
AERIAL RECONNAISSANCE
1
AIRBORNE
1
CAMP CENTURY
1
CANADA
1
CHEMICAL PROPERTIES
1
CLIMATIC CHANGE
1
CORRELATION TECHNIQUES
1
CRYSTAL GROWTH)
1
Cartography and Aerial Photography
1
DEPTH FINDING)
1
ELECTRICAL CONDUCTIVITY)
1
FORECASTING
1
GLACIERS
1
GLACIERS)
1
GLACIOLOGY
1
ICE ISLANDS
1
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