Green-bug or spring grain-aphis : How to prevent its periodical outbreaks.

Bibliographic Details
Format:	Government Document eBook
Language:	English
Published:	[Washington] : GPO, 1921.
Series:	Farmers' Bull. No. 1217
Subjects:	Maps. Pests > Control. Electronic books.
Online Access:	Connect to the full text of this electronic document

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