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USSR
*PERMAFROST
2
ARCTIC REGIONS
2
ECOSYSTEMS
2
NATURAL RESOURCES
2
PERMAFROST
2
VEGETATION
2
*CONSTRUCTION
1
*ENVIRONMENTAL PROTECTION
1
*GEOGRAPHY
1
*LANDING FIELDS
1
*POLAR REGIONS
1
*SYMPOSIA
1
ABSTRACTS
1
AIR POLLUTION
1
ALASKA
1
AST24
1
BUILDINGS
1
CIVIL ENGINEERING
1
COLD REGIONS
1
CONCRETE
1
CONSTRUCTION
1
COUNTERMEASURES
1
Civil Engineering
1
Construction Equipment
1
DAMAGE
1
DEPLETION
1
DRAINAGE
1
ENGINEERING GEOLOGY
1
ENVIRONMENTAL MANAGEMENT
1
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