Subject
- Fisheries -- Oregon177
- Game and game-birds -- Oregon174
- Game protection -- Oregon174
- 4-H clubs153
- Agriculture -- Oregon53
- Wildlife management -- Oregon52
- Fishing -- Oregon47
- Hunting -- Oregon47
- Douglas fir46
- Forests and forestry -- Northwest, Pacific39
- Forests and forestry -- Oregon37
- Herbicides36
- Engineering33
- Forests and forestry -- Research -- Oregon33
- Soils -- Oregon33
- Cattle -- Feeding and feeds32
- Reforestation -- Oregon30
- Wheat30
- Swine -- Feeding and feeds23
- American wood22