Subject
- Agrilus -- United States1
- Chestnut -- Diseases and pests -- United States1
- Chestnut-borer -- United States1
- Circular (United States. Bureau of Entomology)1
- Circular (United States. Division of Entomology)1
- Pine -- Diseases and pests1
- Ponderosa pine -- Diseases and pests -- Oregon1
- Ponderosa pine -- Oregon -- Growth1
- White pine weevil1