Subject
- Forests and forestry -- Northwest, Pacific34
- Fisheries -- Oregon25
- Game and game-birds -- Oregon22
- United States. Forest Service. Pacific Northwest Region22
- United States. Forest Service. Pacific Northwest Region. Thirty Year Club22
- Game protection -- Oregon21
- Forests and forestry -- Research -- Oregon12
- Forest products -- Research -- Oregon10
- Lane County (Or.) -- History10
- Oregon State University. College of Forestry10
- Oregon State University. Forest Research Laboratory10
- Forests and forestry -- Research -- Northwest, Pacific9
- Mineral industries -- Oregon9
- Natural gas -- Prospecting -- Oregon9
- Petroleum -- Prospecting -- Oregon9
- Agriculture -- Research -- Columbia River Watershed8
- Columbia Basin Agricultural Research Center -- Periodicals8
- Pacific Northwest Forest and Range Experiment Station (Portland, Or.)8
- Wildlife management -- Oregon8
- Central Oregon Agricultural Research Center -- Periodicals7