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Topic
- Salmon 31
- Dams 24
- Rivers--Oregon 20
- Fishes--Conservation 13
- Lectures and lecturing 10
- Fishways 4
- Flood control 4
- Water--Pollution 4
- Hunting 3
- Beavers 2
- Finley, William L. (William Lovell), 1876-1953 2
- Fishing 2
- Trout 2
- Antelopes 1
- Bears 1
- Birds--Conservation 1
- Birds--Housing 1
- Colaptes 1
- Fisheries 1
- General Wildlife Federation 1