Gall aphids of the elm
By: [Edith M. Patch]
Series: Bulletin / Maine Agricultural Experiment Station -- no.       181
Publisher: Maine Agricultural Experiment Station
Published: 1910
Place of publication: Orono
Language: eng
Number of pages: 240
Subjects: Insects; Aphids; Galls (Botany); Elm; Diseases and pests
Notes: Cover title.

Bibliography: p. 205-208.