A study of pansy and other viola leaf spot diseases
By: by Edmond Clair Calavan.
Published: 1941
Language: eng
Number of pages: 49
Subjects: Pansies -- Diseases and pests.; Leaf spots.; Violets -- Diseases and pests.
Notes: Typescript.

Mounted photographs.

Thesis (M.S.)--Oregon State College, 1941.

Bibliography: leaves 45-49.