Subject
- Fisheries -- Oregon35
- Game and game-birds -- Oregon31
- Game protection -- Oregon31
- Engineering11
- Fish culture -- Oregon6
- Industrial arts -- Study and teaching6
- Wildlife conservation -- Oregon5
- Wildlife management -- Oregon5
- Forests and forestry -- Northwest, Pacific4
- Forests and forestry -- Washington (State)4
- 4-H clubs3
- Dairy cattle -- Feeding and feeds3
- Fences -- Deterioration3
- Fences -- Preservation3
- Forests and forestry -- Oregon3
- Forests and forestry -- Research -- Northwest, Pacific3
- Hydrolysis3
- Pacific Northwest Forest and Range Experiment Station (Portland, Or.)3
- Science -- Study and teaching3
- Wood poles -- Deterioration3