Subject
- Game protection -- Oregon132
- Game and game-birds -- Oregon131
- Fisheries -- Oregon120
- Oregon State University -- Curricula114
- Forests and forestry -- Oregon47
- Wildlife management -- Oregon42
- Entomology37
- Forests and forestry -- Northwest, Pacific37
- Agricultural experiment stations -- Research -- Oregon -- Jackson County36
- Agriculture -- Oregon -- Jackson County -- Field experiments36
- Agriculture -- Oregon -- Statistics33
- Farm produce -- Oregon -- Statistics31
- Oregon State University. College of Forestry31
- Lane County (Or.) -- History30
- Forests and forestry -- Research -- Oregon29
- Spraying and dusting in agriculture -- Oregon -- Willamette River Valley26
- Pesticides -- Application -- Oregon -- Willamette River Valley25
- Fishery management -- Oregon -- Statistics24
- Agricultural pests -- Control -- Congresses23
- Fish culture -- Oregon23