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Topic
- Fishing 30
- Hunting 12
- Rivers--Oregon 8
- Salmon 7
- Trout 6
- Dams 4
- Fishes--Conservation 4
- Beavers 3
- Water--Pollution 3
- Wildlife refuges 3
- Birds--Conservation 2
- Ducks 2
- Elk 2
- Fishways 2
- Islands--Alaska 2
- Lectures and lecturing 2
- Woodpeckers 2
- Agriculture 1
- American Game Association 1
- Bears 1