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GREENLAND
6
Ice and Permafrost
4
Snow
4
ANTARCTIC REGIONS
3
(*SNOW
2
*FEASIBILITY STUDIES
2
*SLEDS
2
ANISOTROPY
2
CARGO
2
COSTS
2
Economics and Cost Analysis
2
HMW-PE(HIGH MOLECULAR WEIGHT POLYETHYLENE)
2
ICE CAPS
2
MOLECULAR WEIGHT
2
PERMEABILITY
2
POLAR REGIONS
2
SUPPLIES
2
Surface Transportation and Equipment
2
TABLES(DATA)
2
TEST AND EVALUATION
2
TRACTORS
2
TRANSPORT AIRCRAFT
2
(*ATMOSPHERIC TEMPERATURE
1
(*ICE
1
(*POLAR REGIONS
1
(*RUNWAYS
1
*Antarctic regions
1
*CARGO VEHICLES
1
*CLIMATE)
1
*COMPRESSIVE PROPERTIES)
1
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