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Topic
- Fishing 20
- Hunting 10
- Rivers--Oregon 5
- Fishes--Conservation 4
- Salmon 3
- Water--Pollution 3
- Wildlife refuges 3
- Beavers 2
- Birds--Conservation 2
- Dams 2
- Ducks 2
- Fishways 2
- Lectures and lecturing 2
- Trout 2
- Woodpeckers 2
- Agriculture 1
- American Game Association 1
- Bighorn sheep 1
- Birds--Housing 1
- Bonneville Dam Fishways Committee 1
