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By: Roark, R. C. (Ruric Creegan) - United States. Bureau of Chemistry and Soils. Insecticide Division. - United States. Bureau of Entomology and Plant Quarantine. Insecticide Division.Edition:Publication info: Washington, D.C, [The Bureau], 1934-1935Volume: no.17Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects:BHL Collections: