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ANTARCTIC REGIONS
3
GREENLAND
Ice and Permafrost
3
Snow
3
(*GLACIERS
2
CANADA
2
MELTING
2
RADAR REFLECTIONS
2
(*ICE
1
(*PERMAFROST
1
(*SNOW
1
(*SURVEYING(GEOGRAPHIC)
1
*ABSTRACTS)
1
*BIBLIOGRAPHIES)
1
AERIAL PHOTOGRAPHS
1
AERIAL RECONNAISSANCE
1
AIRBORNE
1
ALASKA
1
ARCTIC REGIONS
1
CONSTRUCTION
1
CRYSTAL GROWTH
1
CRYSTAL STRUCTURE
1
Cartography and Aerial Photography
1
DEPTH FINDING
1
DEPTH FINDING)
1
EROSION
1
FREEZING
1
FRICTION
1
FROST HEAVE
1
GEOLOGY
1
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