relationship of aspect and topographic position to the occurrence of Douglas-fir bark beetle damage in western Oregon and southwestern Washington
By: by John David Rossheim.
Published: 1957
Language: eng
Number of pages: 55
Subjects: Bark beetles.; Douglas fir -- Diseases and pests.
Notes: Typescript.

Thesis (M.S.)--Oregon State College, 1957.

Bibliography: leaves 42-44.