Subject
- Fish culture -- Oregon -- Willamette River Valley -- Water-supply1
- Fish hatcheries -- Environmental aspects -- Oregon -- Willamette River Valley1
- Fish hatcheries -- Oregon -- Willamette River Valley1
- Hatchery fishes -- Diseases -- Oregon -- Willamette River Valley1
- Hatchery fishes -- Microbiology -- Oregon -- Willamette River Valley1
- Salmon -- Diseases -- Oregon -- Willamette River Valley1
- Salmon -- Diseases -- Transmission -- Oregon -- Willamette River Valley1
- Salmon -- Microbiology -- Oregon -- Willamette River Valley1