Woolly aphid of the elm
By: [Edith M. Patch]
Series: Bulletin / Maine Agricultural Experiment Station -- no.       220
Publisher: Maine Agricultural Experiment Station
Published: 1913
Place of publication: Orono
Language: eng
Number of pages: 298
Subjects: Elm; Diseases and pests
Other titles: Woolly aphids of the elm.
Notes: Caption title: Woolly aphids of the elm.

Includes bibliographies.