Anatomical changes in the secondary phloem of grand fir (Abies grandis (Dougl.) Lindl.), induced by the balsam woolly aphid (Adelges piceae Ratz.)
By: by Roy Hirofumi Saigo.
Published: 1969
Language: eng
Number of pages: 91
Subjects: Adelges.; Abies grandis -- Diseases and pests.
Notes: Typescript.

Thesis (Ph. D.)--Oregon State University, 1969.

Bibliography: leaves 88-91.