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54 Environmental Sciences
3
Arctic Regions
3
Carbon 14 Compounds
Alaska
2
Aquatic Ecosystems
2
Carbon 13
2
Coastal Regions
2
Energy Budgets
2
Isotope Ratio
2
Mosses
2
Natural Radioactivity
2
Tundra
2
540210
1
540210 -- Environment
1
Animals
1
Aquatic-- Basic Studies-- (1990-)
1
Basic Studies
1
Bryophyta
1
Carbon Compounds
1
Carbon Cycle
1
Carbon Dioxide Fixation
1
Carbon Isotopes
1
Carbon Sinks
1
Cesium 137
1
Chemicals Monitoring And Transport
1
Cryosphere
1
Deer
1
Deer 540310
1
Developed Countries
1
Ecosystems
1
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