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