Subject
- Fisheries -- Oregon190
- Game protection -- Oregon184
- Game and game-birds -- Oregon183
- 4-H clubs162
- Agriculture -- Oregon107
- Agriculture72
- Herbicides61
- Douglas fir57
- Wildlife management -- Oregon56
- Fishing -- Oregon49
- Hunting -- Oregon49
- Forests and forestry -- Oregon45
- Forests and forestry -- Northwest, Pacific43
- Forests and forestry -- Research -- Oregon36
- Reforestation -- Oregon36
- Soils -- Oregon34
- Cattle -- Feeding and feeds33
- Engineering33
- Wheat31
- Weeds -- Control30