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*SEA ICE
ARCTIC OCEAN
2
COASTAL REGIONS
ICE
Ice and Permafrost
2
Snow
2
*CARGO SHIPS
1
*ICEBREAKERS
1
ARCTIC SEAS
1
BATHYMETRY
1
BIBLIOGRAPHIES
1
DATA BASES
1
ECONOMIC IMPACT
1
ECONOMICS
1
FORECASTING
1
FOREIGN TECHNOLOGY
1
GEOGRAPHY
1
ICEBREAKING
1
IMAGES
1
MAPS
1
MARINE PROPULSION
1
MARINE TRANSPORTATION
1
Marine Engineering
1
NAVIGATION
1
NORTHERN SEA ROUTE
1
OCEANOGRAPHIC DATA
1
OCEANOGRAPHY
1
OCEANS
1
POLAR REGIONS
1
PROPULSION SYSTEMS
1
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