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54 Environmental Sciences
540210 -- Environment
1
Alaska
1
Animals
1
Aquatic Ecosystems
Aquatic-- Basic Studies-- (1990-)
1
Arctic Regions
1
Bryophyta
1
Carbon 13
1
Carbon 14 Compounds
1
Carbon Compounds
1
Carbon Isotopes
1
Coastal Regions
1
Cryosphere
1
Deer
1
Developed Countries
1
Ecosystems
1
Energy Budgets
1
Even-Odd Nuclei
Isotope Ratio
1
Isotopes
1
Labelled Compounds
1
Light Nuclei
Mammals
1
Mosses
Natural Radioactivity
1
North America
1
Nuclei
1
Plants
1
Polar Regions
1
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