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(*SOILS
3
EROSION)
Ice and Permafrost
3
Snow
3
Soil Mechanics
3
TRANSLATIONS
TUNDRA
3
USSR
3
(*PERMAFROST
2
*SOIL EROSION
2
FREEZING
2
MELTING
2
TERRAIN)
2
*FREEZING
1
*SOILS
1
ABSORPTION
1
ATMOSPHERIC PRECIPITATION
1
CALCIUM COMPOUNDS
1
CHEMICAL PROPERTIES
1
CLIMATE
1
COLLOIDS
1
COOLING
1
DEPOSITS
1
EXPOSURE(PHYSIOLOGY)
1
HYGROSCOPICITY
1
MICROSTRUCTURE
1
MONTMORILLONITE
1
NETWORKS
1
ORGANIC MATERIALS
1
PERMAFROST
1
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