Subject
- Agriculture -- Oregon93
- 4-H clubs76
- Forests and forestry -- Oregon46
- Heat -- Transmission46
- Agriculture41
- Fisheries -- Oregon38
- Forests and forestry -- Northwest, Pacific36
- Fisheries -- Economic aspects -- Congresses34
- Wildlife management -- Oregon33
- Herbicides30
- Forests and forestry -- Washington (State)28
- Sandwich construction -- Testing27
- Forest surveys -- Washington (State)26
- Forests and forestry -- Washington (State) -- Statistics26
- Douglas fir25
- Reforestation -- Oregon25
- Game and game-birds -- Oregon24
- Game protection -- Oregon24
- Vegetable gardening -- Oregon24
- Forests and forestry23