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Topic
- Wildlife refuges 28
- Birds--Conservation 18
- Lectures and lecturing 9
- Agriculture 4
- Hunting 4
- Lakes--California 3
- Lakes--Oregon 3
- Wildlife management 3
- Conservation of natural resources 2
- Fishes--Conservation 2
- Fishing 2
- Lumber trade 2
- Migratory birds 2
- Oregon Wildlife Federation 2
- Rivers--Oregon 2
- Waterfowl 2
- Wildlife conservation 2
- Advisory Committee on Rural Land Zoning 1
- Antelopes 1
- Beavers 1
