Subject
- Abies grandis -- Growth -- Mathematical models1
- Douglas fir -- Growth -- Mathematical models1
- Douglas fir -- Oregon -- Willamette River Valley1
- Douglas fir -- Oregon -- Willamette River Valley -- Development -- Mathematical models1
- Douglas fir -- Oregon -- Willamette River Valley -- Growth -- Mathematical models1
- Douglas fir -- Oregon -- Willamette Valley -- Growth -- Mathematical models1
- Forests and forestry -- Measurement -- Mathematical models1