The root insect-- black-stain root disease association in Douglas-fir
Subtitle: vector relationships and implications for forest management
By: by Jeffrey John Witcosky.
Published: 1985
Language: eng
Number of pages: 134
Subjects: Douglas fir -- Diseases and pests.
Notes: Typescript (photocopy).

Thesis (Ph. D.)--Oregon State University, 1985.

Bibliography: leaves 127-134.