Subject
- Game and game-birds -- Oregon146
- Game protection -- Oregon146
- Fisheries -- Oregon143
- Wildlife management -- Oregon122
- Fishing -- Oregon110
- Hunting -- Oregon110
- Forests and forestry -- Northwest, Pacific59
- Forests and forestry -- Oregon51
- Agricultural pests -- Control -- Congresses45
- Oregon State University. College of Forestry41
- Agriculture -- Oregon33
- 4-H clubs29
- United States. Forest Service. Pacific Northwest Region25
- United States. Forest Service. Pacific Northwest Region. Thirty Year Club25
- Forests and forestry -- Research -- Oregon24
- Agriculture23
- Forests and forestry -- Research -- Northwest, Pacific21
- Greenhouse gases -- Forecasting21
- Fish culture -- Oregon19
- Pacific Northwest Forest and Range Experiment Station (Portland, Or.)18