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By: Woodrow, A. W. - App, Bernard Auman, - United States. Office of Experiment Stations.Edition:Publication info: [Washington, D.C.], [U.S. Department of Agriculture, Bureau of Entomology and Plant Quarantine], [1950]Volume:Series:Holding Institution: University of Florida, George A. Smathers LibrariesSubjects: Seed separators Threshing machinesBHL Collections: Expanding Access to Biodiversity Literature