Subject
- Railroad ties2
- Fish culture -- Oregon -- Periodicals1
- Fisheries -- Oregon -- Periodicals1
- Forest management -- Environmental aspects -- Northwest, Pacific1
- Forests and forestry1
- Forests and forestry -- Northwest, Pacific1
- Habitat (Ecology)1
- Northern spotted owl -- Northwest, Pacific1
- Old growth forests -- Government policy -- Northwest, Pacific1
- Old growth forests -- Northwest, Pacific1
- Oregon State Agricultural College1
- Railroad tracks1
- Wildlife conservation -- Northwest, Pacific1
- Wood -- Preservation1