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- Fishes--Conservation 2
- Forests and forestry 2
- Lakes--California 2
- Lakes--Oregon 2
- Rivers--Oregon 2
- Water--Pollution 2
- Wildlife conservation 2
- Wildlife refuges 2
- Advisory Committee on Rural Land Zoning 1
- Agriculture 1
- Birds--Conservation 1
- Burning of land 1
- Dams--Design and construction 1
- Douglas County Planning Commission (Or.) 1
- Forest fires 1
- Forestry law and legislation 1
- Hunting 1
- Izaak Walton League of America 1
- Land use, Rural 1
- Land use, Urban 1