Subject
- Lane County (Or.) -- History27
- Oregon -- History7
- Forests and forestry -- Northwest, Pacific6
- Oregon -- Description and travel6
- United States. Forest Service. Pacific Northwest Region6
- United States. Forest Service. Pacific Northwest Region. Thirty Year Club6
- Baculoviruses4
- Dissertations, Academic -- United States -- Bibliography -- Catalogs4
- Oregon4
- Oregon State University -- Dissertations -- Bibliography -- Catalogs4
- Oregon Territory -- History4
- Frontier and pioneer life -- Oregon3
- Missions -- Oregon3
- Northwest, Pacific3
- Astoria (Or.)2
- Benton County (Or.) -- History2
- Clark County (Wash.) -- History -- Periodicals2
- Columbia River Valley -- Ethnic Relations -- History2
- Conservation of natural resources -- United States2
- Dissertations, Academic -- United States -- Bibliography2