United States. Bureau of Entomology and Plant Quarantine. (1938). Biology of pea weevil in Pacific Northwest with suggestions for its control on seed peas. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Entomology and Plant Quarantine. Biology of Pea Weevil in Pacific Northwest with Suggestions for Its Control on Seed Peas. [Washington]: [s.n.], 1938.
MLA (9th ed.) CitationUnited States. Bureau of Entomology and Plant Quarantine. Biology of Pea Weevil in Pacific Northwest with Suggestions for Its Control on Seed Peas. [s.n.], 1938.
Warning: These citations may not always be 100% accurate.