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  1. By: Giles, F. A. (Floyd A.) - Siefert, W. B.
    Publication info: Urbana, Ill. :University of Illinois at Urbana-Champaign, College of Agriculture, Cooperative Extension Service,1971.
    Holding Institution: University Library, University of Illinois Urbana Champaign
  2. By: Giles, F. A. (Floyd A.) - Siefert, W. B.
    Edition: Rev. Dec. 1971
    Publication info: Urbana, Ill. :University of Illinois at Urbana-Champaign, College of Agriculture, Cooperative Extension Service,1971.
    Holding Institution: University Library, University of Illinois Urbana Champaign