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(*TREES
3
TREES)
CLIMATE
2
SOILS
2
(*ARCTIC REGIONS
1
(*ECOLOGY
1
(*GEOLOGIC AGE DETERMINATION
1
(*PALEONTOLOGY
1
(*PERMAFROST
1
*ALASKA)
1
ABUNDANCE
1
AERIAL PHOTOGRAPHS
1
Anatomy and Physiology
1
CANADA
1
CHARCOAL
1
CONSTRUCTION
1
ECOLOGY
1
FACTOR ANALYSIS
1
FOREST FIRES
1
FREEZING
1
Forestry
1
GEOGRAPHY
1
GROWTH(PHYSIOLOGY)
1
GROWTH(PHYSIOLOGY))
1
Ice and Permafrost
1
MAPPING
1
MEASUREMENT
1
MILITARY FACILITIES
1
MOISTURE
1
Meteorology
1
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