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(*PERMAFROST
*FREEZING
3
*SOILS
FREEZING
Ice and Permafrost
3
Snow
3
(*SOILS
2
ICE
2
MELTING
2
MOISTURE
2
RIVERS
2
Soil Mechanics
2
TEMPERATURE
2
TRANSLATIONS
2
USSR
2
(*FOUNDATIONS(STRUCTURES)
1
*SOIL EROSION
1
*TUNDRA
1
ARCTIC REGIONS)
1
CLIMATE
1
COOLING
1
DESIGN)
1
DRILLING
1
EROSION)
1
FOREST LAND
1
FORESTRY
1
FROST HEAVE
1
INTERACTIONS
1
METEOROLOGICAL PHENOMENA
1
NETWORKS
1
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