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  1. Pork-production /
    By: Smith, William Wesley, - Craig, Robert Alexander,
    Publication info: New York :Macmillan,1920.
    Contributed by: Cornell University Library
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  2. Pork-production, by William W. Smith ... with a chapter on The prevention of hog diseases, by R. A. Craig.
    By: Smith, William Wesley, - Craig, Robert Alexander,
    Publication info: New York :The Macmillan Company,1920.
    Contributed by: University of California Libraries (archive.org)
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