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  1. By: Doolittle, S. P. (Sears Polydore), - Walker, M. N. (Marion Newman),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1926
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Control  Cucumber mosaic virus  Cucumbers  Diseases and pests  Plant parasites