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  1. Science of successful threshing. Dingee-MacGregor.
    By: MacGregor, Wallace F., - Dingee, W. W.,
    Edition: 5th ed., rev. and enl.
    Publication info: Racine, Wis.,J. I. Case Threshing Machine Co.,1907.
    Contributed by: Library of Congress
    BHL Collections: Library of Congress
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  2. Science of successful threshing. Dingee-MacGregor.
    By: MacGregor, Wallace F., - Dingee, W. W.,
    Edition: 6th ed., rev. and enl.
    Publication info: Racine, Wis.,J.I. Case threshing machine co., incorporated,1911.
    Contributed by: Library of Congress
    BHL Collections: Library of Congress
    View Book
  3. Science of successful threshing. Dingee-MacGregor.
    By: MacGregor, Wallace F., - Dingee, W. W.,
    Edition: 5th ed., rev. and enl.
    Publication info: Racine, Wis.,J. I. Case Threshing Machine Co.,1907.
    Contributed by: University of California Libraries (archive.org)
    View Book
  4. Science of successful threshing. Dingee-MacGregor.
    By: MacGregor, Wallace F., - Dingee, W. W.
    Edition: 6th ed., rev. and enl.
    Publication info: Racine, Wis. :J.I. Case threshing machine co., incorporated,1911.
    Contributed by: University of California Libraries (archive.org)
    View Book