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- Izaak Walton League of America 3
- Rivers--Oregon 2
- Water--Pollution 2
- Finley, William L. (William Lovell), 1876-1953 1
- Motion pictures 1
- National parks and reserves 1
- Nature films 1
- Nature photography 1
- Oregon Cavemen Inc. 1
- Portland Chamber of Commerce (Or.) 1
- Roads--Design and construction 1
- Sewage disposal plants 1
- Southwestern Oregon Wild Life Federation 1