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Topic
- Lectures and lecturing 14
- Rivers--Oregon 5
- Dams 4
- Oregon Wildlife Federation 4
- Fishes--Conservation 3
- Flood control 3
- Poaching 3
- Swans 3
- Commencement ceremonies 1
- Conservation of natural resources 1
- Finley, William L. (William Lovell), 1876-1953 1
- Irrigation 1
- National Wildlife Federation 1
- Oregon Audubon Society 1
- Pacific College (Newberg, Or.) 1
- Salmon 1
- Sewage disposal plants 1
- Water--Pollution 1