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The Work of the Division of Insecticide Investigations, 1927-1939

United States. Bureau of Entomology and Plant QuarantineUnited States. Bureau of Entomology and Plant Quarantine. Division of Insecticide InvestigationsR. C. Roark

出版	The Bureau, 1940
URL	http://books.google.com.hk/books?id=OwlDAAAAYAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN