Poria weirii root rot of Douglas-fir
Subtitle: survival of the pathogen and infection of the host
By: by Earl Edward Nelson.
Published: 1962
Language: eng
Number of pages: 71
Subjects: Root rots.; Douglas fir -- Diseases and pests.
Notes: Typescript.

Thesis (Ph. D.)--Oregon State University, 1962.

Bibliography: leaves 68-71.