Creator
- Oregon State College. Extension Service110
- Oregon State University. Extension Service32
- Clackamas County (Or.)6
- Jackson County (Or.)6
- Lane County (Or.)6
- Polk County (Or.)6
- Benton County (Or.)5
- Josephine County (Or.)5
- Klamath County (Or.)5
- Washington County (Or.)5
- Yamhill County (Or.)5
- Baker County (Or.)4
- Clatsop County (Or.)4
- Columbia County (Or.)4
- Coos County (Or.)4
- Curry County (Or.)4
- Deschutes County (Or.)4
- Gilliam County (Or.)4
- Harney County (Or.)4
- Lake County (Or.)4