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By: Webster, F. M. (Francis Marion), - United States. Bureau of Entomology. - United States. Department of Agriculture.Edition: Revision.Publication info: Washington, D.C, U.S. Dept. of Agriculture, Bureau of Entomology, 1909Volume: ser.2:no.93Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects: Agricultural pests Aphids Diseases and pests Grain Greenbug ToxopteraBHL Collections:
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By: Webster, F. M. (Francis Marion), - United States. Bureau of Entomology. - United States. Department of Agriculture.Edition:Publication info: Washington, D.C, U.S. Dept. of Agriculture, Bureau of Entomology, 1907Volume: ser.2:no.93Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects: Agricultural pests Aphids Diseases and pests Grain Greenbug ToxopteraBHL Collections: