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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Roethe, Harry E. (Harry Edward),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1923
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Roethe, Harry E. (Harry Edward),
    Publication info: (Wash, 1920)
    Holding Institution: Library of Congress