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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Whitcomb, Warren,
    Edition: Rev.
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1942
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Whitcomb, Warren,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1936
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library