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Ice and Permafrost
Snow
5
ARCTIC OCEAN
4
ANTARCTIC REGIONS
3
*ICE
2
ARCTIC REGIONS
2
GLACIERS
2
Hydrology
2
ICE
2
ICE ISLANDS
2
Limnology and Potamology
2
SEA ICE
2
TABLES(DATA)
2
(*SEA ICE
1
(*WEATHER FORECASTING
1
*ARCTIC REGIONS)
1
*BLACK SEA
1
*HYDROGRAPHY
1
*Post-Cromerian rise
1
*SEA ICE
1
*SEA LEVEL
1
*SNOW
1
*WATER
1
AERIAL RECONNAISSANCE
1
ALBEDO
1
ATLAS
1
ATMOSPHERIC PRECIPITATION
1
BALANCE
1
BERING STRAIT
1
BUDGETS
1
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