Subject
- Forests and forestry -- Research -- Oregon67
- Reforestation -- Oregon41
- Agricultural pests -- Control -- Congresses26
- Forests and forestry -- Northwest, Pacific21
- Oregon State University. College of Forestry21
- Fishing -- Oregon19
- Hunting -- Oregon19
- United States. Forest Service. Pacific Northwest Region19
- United States. Forest Service. Pacific Northwest Region. Thirty Year Club19
- Wildlife management -- Oregon19
- Oregon State University. College of Agriculture Science -- Periodicals18
- Columbia Basin Agricultural Research Center -- Periodicals17
- Forest products -- Research -- Oregon17
- Oregon State University. Forest Research Laboratory17
- Hatfield Marine Science Center16
- Agriculture -- Research -- Columbia River Watershed15
- Fisheries -- Oregon14
- Lane County (Or.) -- History14
- Marine sciences14
- Game and game-birds -- Oregon12