Subject
- Catalogs, Publishers' -- Oregon11
- College publications -- Oregon11
- Forests and forestry -- Northwest, Pacific2
- Fruit -- Diseases and pests -- Control -- Columbia River Valley2
- Pesticides -- Application -- Columbia River Valley2
- Spraying and dusting in agriculture -- Columbia River Valley2
- Burning of land1
- Education, Secondary -- Economic aspects -- Oregon1
- Farm management -- Data processing -- Handbooks, manuals, etc1
- Fires -- Climatic factors -- United States1
- Flexible manufacturing systems1
- Forest management -- Environmental aspects -- Northwest, Pacific1
- Forest policy -- Economic aspects -- Northwest, Pacific1
- Forest policy -- Social aspects -- Northwest, Pacific1
- Forests and forestry1
- Geothermal engineering1
- Habitat (Ecology)1
- Hardwoods -- West (U.S.)1
- Heavy metals -- Analysis1
- Logging -- Economic aspects -- West (U.S.)1