The biology of the balsam woolly aphid, Chermes piceae Ratz., in Oregon and Washington and the identification and evaluation of its native predators
By: by Russel Gene Mitchell.
Published: 1960
Language: eng
Number of pages: 93
Subjects: Adelgidae.; Forest insects.; Fir -- Diseases and pests.
Notes: Typescript.

Thesis (Ph. D.)--Oregon State College, 1960.

Bibliography: leaves 91-93.