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ARCTIC OCEAN
CANADA
6
SEA ICE
NORWAY
5
RUSSIA
3
*ARCTIC REGIONS
2
*SHIPPING
2
CLIMATE CHANGE
2
DENMARK
2
GREENLAND
2
Geography
2
MELTING
2
MINERALS
2
Military Forces and Organizations
2
NATIONAL SECURITY
2
OCEAN CURRENTS
2
OCEANOGRAPHIC DATA
2
PHYSICAL PROPERTIES
2
Physical and Dynamic Oceanography
2
RISK
2
TEMPERATURE
2
UNITED STATES
2
USSR
2
WATER
2
(*ARCTIC REGIONS
1
*ACCESS
1
*ACOUSTIC SCATTERING
1
*CLIMATE
1
*COMMAND AND CONTROL SYSTEMS
1
*ENVIRONMENTAL MANAGEMENT
1
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