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54 Environmental Sciences
14
Alaska
Ecosystems
Arctic Regions
10
North America
10
Surface Waters
9
Developed Countries
8
Mass Transfer
8
Atmospheric Precipitations
7
Hydrology
7
Meteorology
7
Polar Regions
7
Snow
7
Usa
7
58 Geosciences
6
Evaporation
6
Ground Water
6
Heat Transfer
6
Progress Report
6
Tundra
6
Watersheds
6
Aquatic Ecosystems
5
Energy Balance
5
Oxygen Compounds
5
Carbon Isotopes
4
Computerized Simulation
4
Cryosphere
4
Document Types
4
Historical Aspects
4
Hydrogen Compounds
4
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