Subject
- Sewage -- Microbiology2
- Bacterial diseases -- Transmission1
- Feces -- Microbiology -- Oregon -- Tillamook Bay1
- Sewage disposal -- Oregon -- Tillamook County1
- Sewage disposal in the ground -- Health aspects -- Oregon -- Willamette River Valley1
- Soil pollution -- Oregon -- Willamette River Valley1
- Water quality management -- Oregon -- Tillamook Bay1