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PERMAFROST
2
Soil Mechanics
2
TEMPERATURE
2
TRANSLATIONS
2
USSR
2
VEGETATION
2
(*PLANTS(BOTANY)
1
(*USSR
1
*DESERTS
1
*PLANTS(BOTANY)
1
*SOILS)
1
*TUNDRA
1
ARCTIC REGIONS
1
BIOGEOGRAPHY
1
BIRDS
1
EXPOSURE(PHYSIOLOGY)
1
Ecology
1
GEOGRAPHIC DISTRIBUTION
1
GRASSES
1
Ice and Permafrost
1
LICHENS
1
MAMMALS
1
MEASUREMENT
1
PENINSULAS
1
SIBERIA
1
SOILS
1
SWAMPS
1
Snow
1
TERRAIN
1
THAWING
1
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