Subject
- Fisheries -- Oregon54
- Game and game-birds -- Oregon50
- Game protection -- Oregon48
- Forests and forestry -- Northwest, Pacific34
- Forests and forestry -- Oregon31
- Agricultural pests -- Control -- Congresses28
- Oregon State University. College of Forestry23
- Industrial arts -- Study and teaching20
- Douglas fir19
- Oregon State University -- Handbooks, manuals, etc.19
- Wildlife management -- Oregon19
- Oregon State University -- Curricula18
- United States. Forest Service. Pacific Northwest Region18
- United States. Forest Service. Pacific Northwest Region. Thirty Year Club18
- Wood poles -- Maintenance and repair18
- Wood poles -- Preservation18
- Wood -- Preservation17
- Heat -- Transmission16
- Wood poles -- Fumigation16
- Herbicides15