Subject
- Bark29
- Douglas fir16
- Bark beetles14
- Bark -- Utilization13
- Wood -- Chemistry9
- Agricultural pests -- Control -- Congresses6
- Tannins6
- Bark -- Composition5
- Bark beetles -- Idaho5
- Bark beetles -- Montana5
- Bark -- Analysis4
- Cherry bark tortrix -- Control4
- Bark beetles -- Control3
- Bark peeling -- Equipment and supplies3
- Fir3
- Trees -- Diseases and pests -- Idaho3
- Trees -- Diseases and pests -- Montana3
- Bark beetles -- Control -- West (U.S.)2
- Cherry -- Diseases and pests2
- Cherry bark tortrix2