Subject
- Fisheries -- Economic aspects -- Congresses158
- Sustainable fisheries -- Congresses113
- Fisheries -- Oregon73
- Forest influences63
- Forests and forestry -- Oregon63
- Oregon -- Climate63
- Douglas fir62
- Forests and forestry -- Research -- Oregon59
- Forests and forestry -- Northwest, Pacific53
- Game protection -- Oregon53
- Game and game-birds -- Oregon52
- Reforestation -- Oregon51
- Herbicides50
- Machine learning49
- Industrial arts -- Study and teaching45
- Sustainable Fisheries -- Congresses45
- Agriculture -- Oregon44
- Spraying and dusting in agriculture -- Oregon -- Willamette River Valley44
- U.S. International Biological Program. Coniferous Forest Biome43
- Wildlife management -- Oregon43