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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Van Der Zwet, Tom - Beer, S. V. (Steven V.) - United States. Agricultural Research Service. - Cornell University
    Edition: [Slightly rev. June 1999].
    Publication info: Washington, DC, U.S. Dept. of Agriculture, [1999]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library