- 4-H clubs4
- North Willamette Research and Extension Center3
- American kestrel1
- American robin1
- Babysitting1
- Building sites -- Environmental aspects -- Northwest, Pacific -- Handbooks, manuals, etc.1
- Cheese industry -- Licenses -- Oregon1
- Cheesemaking -- Oregon1
- Chickpea -- Oregon1
- Child development1
- Chipmunks1
- Christmas tree industry -- Law and legislation1
- Community development1
- Construction industry -- Environmental aspects -- Northwest, Pacific -- Handbooks, manuals, etc.1
- Contracts, Agricultural -- United States1
- Cover crops -- Oregon, Western1
- Cover crops -- Washington (State), Western1
- Education, Preschool -- Oregon1
- Forestry law and legislation -- United States1
- Group identity1