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By: Litzenberger, Samuel C. (Samuel Cameron), - Stevenson, John A. (John Albert), - United States. Plant Disease Epidemics and Identification Section.Edition:Publication info: Beltsville, Md, Plant Disease Epidemics and Identification Section, Agricultural Research Service, United States Department of Agriculture, 1957Volume: v.243Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects:BHL Collections: