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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
  2. By: Agricultural Research Center (Beltsville, Md.) - Agricultural Research Center-West (U.S.). Northeastern Region. - United States. Agricultural Research Service. Horticultural Crops Research Branch. - United States. Science and Education Administration. Federal Research.
    Publication info: Washington, D.C.,United States Department of Agriculture.
    Holding Institution: Multiple institutions