Biological control of insects and weeds in Oregon
By: [Paul O. Ritcher].
Series: Technical bulletin -- 90.; Technical bulletin (Oregon State University. Agricultural Experiment Station) -- 90.
Publisher: Agricultural Experiment Station, Oregon State University
Published: 1966
Place of publication: Corvallis, Or
Language: eng
Number of pages: 39
Subjects: Insects pests -- Biological control -- Oregon.; Weeds -- Biological control -- Oregon.
Notes: Cover title.

"April 1966."

Includes bibliographical references (p. 36-39).