Subject
- Cavity-nesting birds -- Oregon -- Bibliography1
- Cavity-nesting birds -- Washington (State) -- Bibliography1
- Dissertations, Academic -- United States -- Bibliography -- Catalogs1
- Forest animals -- Habitat -- Oregon -- Bibliography1
- Forest animals -- Habitat -- Washington (State) -- Bibliography1
- Habitat (Ecology) -- Oregon -- Bibliography1
- Habitat (Ecology) -- Washington (State) -- Bibliography1
- Oregon State University -- Dissertations -- Bibliography -- Catalogs1
- Snags (Forestry) -- Oregon -- Bibliography1
- Snags (Forestry) -- Washington (State) -- Bibliography1