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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Mudd, J. Brian (John Brian), - University of Alberta. Department of Plant Science.
    Publication info: 1955
    Holding Institution: University of Alberta Library
    Subjects: Effect of zinc on  Plants  Tomatoes  
  2. By: Viets, Frank G.
    Publication info: Washington, D.C, U.S. Department of Agriculture, [1961]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Effect of zinc on  Nutrition  Plants  Zinc in agriculture