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Topic
- Salmon 215
- Rivers--Oregon 70
- Dams 69
- Fishing 33
- Fishes--Conservation 28
- Rivers--Washington (State) 21
- Lectures and lecturing 16
- Canneries 15
- Seining 15
- Fish hatcheries 11
- Flood control 11
- Fish traps 10
- Water--Pollution 10
- Fishways 8
- Bears 5
- Trout 5
- Waterfalls 5
- Cooking (Fish) 4
- Fishes--Eggs 4
- Hunting 4