Subject
- Fisheries -- Oregon181
- Game and game-birds -- Oregon176
- Game protection -- Oregon176
- 4-H clubs156
- Agriculture -- Oregon53
- Douglas fir53
- Wildlife management -- Oregon51
- Fishing -- Oregon46
- Hunting -- Oregon46
- Herbicides45
- Forests and forestry -- Northwest, Pacific40
- Forests and forestry -- Oregon39
- Soils -- Oregon36
- Forests and forestry -- Research -- Oregon35
- Cattle -- Feeding and feeds33
- Engineering33
- Reforestation -- Oregon32
- Wheat24
- Hatfield Marine Science Center23
- Swine -- Feeding and feeds23