Subject
- Forests and forestry -- Economic aspects -- Oregon7
- Old growth forests -- Oregon6
- Old growth forest ecology -- Oregon4
- Old growth forest ecology -- Oregon -- H.J. Andrews Experimental Forest3
- Douglas fir -- Thinning -- Oregon -- Willamette National Forest2
- Farms -- Recreational use -- Economic aspects -- Oregon2
- Farms -- Recreational use -- Management -- Oregon2
- Forest management -- Economic aspects -- Oregon2
- Forest management -- Economic aspects -- Oregon -- Douglas County2
- Forest management -- Economic aspects -- Oregon -- Willamette National Forest2
- Forest management -- Oregon -- Economic aspects2
- Forest products industry -- Oregon2
- Forest thinning -- Economic aspects -- Oregon -- Willamette National Forest2
- Forests and forestry -- Recreational use -- Economic aspects -- Oregon2
- Forests and forestry -- Recreational use -- Management -- Oregon2
- Land use -- Law and legislation -- Economic aspects -- Oregon2
- Lumber trade -- Oregon2
- McDonald Forest (Or.)2
- Old growth forests -- Soils -- Oregon -- H.J. Andrews Experimental Forest2
- Paul Dunn Forest (Or.)2