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Please read BHL's Acknowledgment of Harmful Content
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  1. By: International Society for Horticultural Science. Working Group on Fireblight Research. - European and Mediterranean Plant Protection Organisation. - Agricultural Research Center (Beltsville, Md.) - Appalachian Fruit Research Station (Kearneysville, W. Va.)
    Publication info: Beltsville, Md, United States Dept. of Agriculture, Science & Education Administration, Agricultural Research Center, 1979-
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library