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*PERMAFROST
2
CLIMATE
2
CONSTRUCTION
2
FREEZING
2
ROADS
2
RUNWAYS
2
WINTER
2
*ALASKA
1
*CONSTRUCTION
1
*ENVIRONMENTS
1
*LANDING FIELDS
1
*OILS
1
*TUNDRA
1
ABANDONMENT
1
AIRFIELDS
1
ALASKA
1
ARCTIC CONSTRUCTION
1
ARCTIC REGIONS
1
Arctic regions -- Discovery and exploration -- Interviews
1
BACKGROUND
1
Bridges
1
Building -- Cold weather conditions -- History
1
CIVIL ENGINEERING
1
Civil Engineering
1
Cold Regions Research and Engineering Laboratory (U.S.) -- History
1
Construction Equipment
1
Crory
1
DAMAGE
1
DRILL PADS
1
DRILLING
1
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