Paul E. Aho

Subjects

Fir, Diseases and pests, Abies concolor, Abies grandis, Wood-decaying fungi, Wounds and injuries, Defoliation, Douglas fir, Douglas-fir tussock moth, Engelmann spruce, Forests and forestry, Indian paint fungus, Logging, Microorganisms, Phytopathogenic fungi, Trees, Valuation, Western spruce budworm

Places

Blue Mountains (Or. and Wash.), Oregon, California, Fremont National Forest, Rogue River National Forest (Or. and Calif.), Washington (State)