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54 Environmental Sciences
5
540210 -- Environment
Terrestrial-- Basic Studies-- (1990-)
5
Isotopes
4
Light Nuclei
4
Nuclei
4
Stable Isotopes
4
Aquatic-- Basic Studies-- (1990-)
3
Arctic Regions
3
Carbon 13
3
Carbon Isotopes
3
Cryosphere
3
Developed Countries
3
Ecosystems
3
Energy Budgets
3
Even-Odd Nuclei
3
Isotope Ratio
3
North America
3
Polar Regions
3
Tundra
3
Alaska
2
Aquatic Ecosystems
2
Carbon Compounds
2
Carbon Cycle
2
Chemistry
2
Coastal Regions
2
Document Types
2
Isotope Applications
2
Matter
2
Microorganisms
2
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