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(*SOILS
5
EROSION)
Ice and Permafrost
5
MELTING
Snow
5
Soil Mechanics
5
TRANSLATIONS
4
USSR
4
FREEZING
3
SOILS
3
TUNDRA
3
(*MOUNTAINS
2
(*PERMAFROST
2
*SNOW)
2
TERRAIN
2
*SOIL EROSION
1
ABSORPTION
1
ALASKA
1
ARCTIC SOILS
1
ATMOSPHERIC PRECIPITATION
1
ATMOSPHERIC TEMPERATURE
1
BUILDINGS
1
BULLDOZERS
1
CALCIUM COMPOUNDS
1
CHEMICAL PROPERTIES
1
COLLOIDS
1
CRACKS
1
DAMAGE
1
DEGRADATION
1
DEPOSITS
1
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