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Please read BHL's Acknowledgment of Harmful Content
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  1. By: United States. Agricultural Marketing Service.
    Edition: Rev. 1989.
    Publication info: [Washington D.C.], United States Dept. of Agriculture, Agricultural Marketing Service, 1989
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Collection and preservation  Plant varieties  Plant Variety Protection Act  Plants  Protection  United States