Subject
- Fungicides -- Analysis3
- Insecticides -- Analysis3
- Agriculture -- Oregon2
- European earwig2
- Forests and forestry -- United States2
- Frontier and pioneer life -- Oregon2
- Land use -- Oregon -- Polk County -- Planning2
- Land use, Rural -- Oregon -- Polk County -- Planning2
- Lumber -- Standards2
- Oregon -- History2
- Pageants -- Oregon -- Eugene2
- Pulping2
- Regional planning -- Oregon -- Polk County2
- United States. Forest Service. Northern Region2
- United States. Forest Service. Northern Region -- Officials and employees2
- Wood -- Deterioration2
- Agriculture -- Oregon -- Experimentation1
- Agriculture, Cooperative -- Oregon1
- Alfalfa1
- Apple -- Postharvest technology1