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Animals
Microorganisms
Plants
6
Fungi
5
54 Environmental Sciences
4
Invertebrates
4
Algae
3
Arthropods
3
Insects
3
Islands
3
Lichens
3
Soils
3
Terrestrial-- Basic Studies-- (-1989)
3
58 Geosciences
2
580202 -- Geophysics-- Volcanology-- (1980-1989)
2
Animalia
2
Biology
2
Biomass
2
Birds
2
Ecology
2
Ecosystems
2
Energy Sources
2
Environmental Effects
2
Food Chains
2
Forest Sciences
2
Growth
2
Mammals
2
Mosses
2
Nonvascular Plants
2
Plantae
2
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