Subject
- Ectomycorrhizas -- Oregon -- Pringle Falls Experimental Forest1
- Fagaceae -- Ecology -- Oregon -- Pringle Falls Experimental Forest1
- Pinaceae -- Ecology -- Oregon -- Pringle Falls Experimental Forest1
- Populus tremuloides -- Climatic factors1
- Populus tremuloides -- Ecophysiology1
- Populus tremuloides -- Genetics1
- Populus tremuloides -- Geographical distribution1