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(*PERMAFROST
(*SOILS
2
*FREEZING
2
*SOILS
FREEZING
Ice and Permafrost
2
RIVERS
2
Snow
2
Soil Mechanics
2
TRANSLATIONS
2
USSR
2
*SOIL EROSION
1
*TUNDRA
1
ARCTIC REGIONS)
1
CLIMATE
1
COOLING
1
EROSION)
1
FOREST LAND
1
FORESTRY
1
ICE
1
INTERACTIONS
1
MELTING
1
METEOROLOGICAL PHENOMENA
1
MOISTURE
1
NETWORKS
1
PERMAFROST
1
PLANTS(BOTANY)
1
SOILS)
1
SWAMPS
1
TEMPERATURE
1
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