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02 PETROLEUM
1
54 ENVIRONMENTAL SCIENCES
1
ALASKA
AQUATIC ECOSYSTEMS
1
ARCTIC OCEAN
1
ARCTIC REGIONS
1
BEAUFORT SEA
1
CARBON 13
1
CARBON ISOTOPES
1
COASTAL REGIONS
CRYOSPHERE
1
DEVELOPED COUNTRIES
1
ECOSYSTEMS
1
ENERGY BUDGETS
1
ENERGY SOURCES
1
EVEN-ODD NUCLEI
1
FOOD CHAINS
1
FOSSIL FUELS
1
FUELS
1
ISOTOPE APPLICATIONS
1
ISOTOPE RATIO
1
ISOTOPES
1
LIGHT NUCLEI
1
MATTER
1
NORTH AMERICA
1
NUCLEI
1
ORGANIC MATTER
1
PEAT
1
POLAR REGIONS
1
SEAS
1
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