Subject
- Douglas fir2
- Conifers1
- Conifers -- Oregon -- Cascade Range1
- Crater Lake National Park (Or.)1
- Douglas fir -- Oregon -- Habitat -- Case studies1
- Forest ecology -- Alaska1
- Forest litter -- Biodegradation1
- Forest litter -- Northwest, Pacific1
- Forest management -- Computer programs1
- Forests and forestry -- Oregon1
- Geographic information systems1
- Marshes -- Oregon -- Salmon River Estuary1
- Plant ecology1
- Plant succession -- Oregon1
- Pseudotsuga -- Ecology1
- Riparian ecology -- Oregon -- Trout Creek Mountains1
- Riparian plants1
- Spruce -- Habitat1
- Stream ecology -- Northwest, Pacific1
- Trout Creek Mountains (Or.)1