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  1. By: Uchtmann, Donald L. - Gehris, Bernard. - University of Illinois at Urbana-Champaign. Cooperative Extension Service.
    Publication info: Urbana, Ill, College of Agricultural, Consumer and Environmental Sciences, University of Illinois at Urbana-Champaign, Cooperative Extension Service, [1997]
    Holding Institution: University Library, University of Illinois Urbana Champaign
  2. By: Uchtmann, Donald L. - Rolf, David - University of Illinois at Urbana-Champaign. Cooperative Extension Service.
    Publication info: Urbana, Ill, College of Agriculture, University of Illinois at Urbana-Champaign, Cooperative Extension Service, [1991]
    Holding Institution: University Library, University of Illinois Urbana Champaign