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- Portland Chamber of Commerce (Or.) 6
- Oregon Cavemen Inc. 4
- Izaak Walton League of America 3
- Rivers--Oregon 2
- Water--Pollution 2
- Advisory Committee on Rural Land Zoning 1
- Agriculture 1
- Burning of land 1
- Douglas County Planning Commission (Or.) 1
- Fishes--Conservation 1
- Forest fires 1
- Forestry law and legislation 1
- Forests and forestry 1
- Foxes 1
- Kingfishers 1
- Lakes--California 1
- Lakes--Oregon 1
- Land use, Rural 1
- Land use, Urban 1
- Land use--Planning 1
