George T Ferrell
Differential susceptibility of White Fir provenances to balsam twig aphid- Gouty pitch midge damage to ponderosa pines planted on fertile and infertile soils in the western Sierra Nevada
- Growth classification systems for red fir and white fir in northern California
- Growth of white firs defoliated by modoc budworm in northeastern California
- Risk-rating systems for mature red fir and white fir in northern California
- Stem volume losses in grand firs topkilled by western spruce budworm in Idaho
- Using indicator plants to assess susceptibility of California red fir and white fir to the fir engraver beetle