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54 Environmental Sciences
Alaska
6
Animals
North America
6
Radioisotopes
4
Usa
4
Beaufort Sea
3
Isotopes
3
Nuclei
3
45 Military Technology
2
510100 -- Environment
2
And National Defense
2
Aquatic Ecosystems
2
Baseline Ecology
2
Beta Decay Radioisotopes
2
Beta-Minus Decay Radioisotopes
2
Birds
2
Carbon Isotopes
2
Coastal Regions
2
Consumption Rates
2
Data
2
Data Forms
2
Deer
2
Developed Countries
2
Ecology
2
Ecosystems
2
Energy Budgets
2
Environmental Effects
2
Food Chains
2
Information
2
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