Topics
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Appropriations and expenditures
12
Aquatic animals
3
Aquatic biology
6
Aquatic ecology
2
Aquatic habitats
21
Aquatic insects
1
Aquatic mammals
3
Aquatic organisms
1
Aquatic resources
2
Arch dams
3
Archaeological geology
1
Archaeological significance
14
Archaeological site location
3
Archaeological surveying
33
Archaeology
3
Archaeology and state
1
Arctic cisco
2
Arctic grayling
11
Armed Forces
4
Aspen
1
Athapascan Indians
1
Atlantic salmon
1
Atmospheric carbon dioxide
1
Atmospheric diffusion
1
Atomic absorption spectroscopy
1
Attitudes
3
Auditing
2
Authorship
1
Bald eagle
6
Barren ground caribou
4
Bats
4
Bear hunting
1
Bear populations
1
Bears
1
Beavers
4
Bed load
2
Behavior
13
Benthic animals
11
Benthic plants
1
Big game animals
13
Big game hunting
3
Bighorn sheep
1
Bioaccumulation
7
Bioenergetics
2
Biological productivity
1
Biotic communities
11
Bird kills
1
Bird populations
1
Bird surveys
7
Birds
16
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