Subject
- Fisheries -- Economic aspects -- Congresses157
- Sustainable fisheries -- Congresses114
- Fisheries -- Oregon74
- Forest influences64
- Game protection -- Oregon64
- Oregon -- Climate64
- Game and game-birds -- Oregon62
- Douglas fir61
- Forests and forestry -- Research -- Oregon58
- Herbicides56
- Heat -- Transmission53
- Reforestation -- Oregon52
- Forests and forestry -- Northwest, Pacific51
- Forests and forestry -- Oregon49
- Machine learning48
- Industrial arts -- Study and teaching47
- U.S. International Biological Program. Coniferous Forest Biome47
- Agriculture -- Oregon46
- Spraying and dusting in agriculture -- Oregon -- Willamette River Valley44
- Sustainable Fisheries -- Congresses43