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- National parks and reserves 15
- Hunting 3
- Mountains--Oregon 3
- Swans 3
- Wildlife refuges 3
- Bears 2
- Gates 2
- Motion pictures 2
- Nature films 2
- Antelopes 1
- Birds--Conservation 1
- Eagles 1
- Feathers 1
- Geese 1
- Hawks 1
- Izaak Walton League of America 1
- Natural history museums 1
- Odontophoridae 1
- Oregon. State Board of Fish and Game Commissioners 1
- Owls 1