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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Engler, Kevin. - National Agricultural Library (U.S.)
    Publication info: Beltsville, Md, National Agricultural Library, [1990]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Engler, Kevin. - National Agricultural Library (U.S.)
    Publication info: Beltsville, Md, U.S. Dept. of Agriculture, National Agricultural Library, [1989?]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library