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By: United States. Bureau of Entomology and Plant Quarantine. Division of Forest Insect Investigations.Edition:Publication info: Beltsville, Maryland, United States Departmentof Agriculture, Bureau of Entomology and Plant Quarantine, Division of Forest Insect Investigations, 1951Volume:Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects:BHL Collections:
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By: Keen, F. P. (Frederick Paul), - United States. Bureau of Entomology and Plant Quarantine. Division of Forest Insect Investigations.Edition:Publication info: Portland, Oregon, United States Bureau of Entomology and Plant Quarantine, June 1, 1937Volume: 1937Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects:BHL Collections: