Onion mildew
By: by C.E. Owens.
Contributors: Oregon Agricultural College. Extension Service.
Series: Cir -- 56.; Circular (Oregon Agricultural College. Extension Service) -- 56.
Publisher: Oregon Agricultural College, Extension Service
Published: 1917
Place of publication: Corvallis, OR
Language: eng
Subjects: Downy mildew of onion -- Oregon.; Onions -- Diseases and pests -- Oregon.
Notes: Caption title.

"July, 1917."