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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Rothgeb, Benton E. (Benton Early), - Sieglinger, John B. (John Beardsley),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1920
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Rothgeb, Benton E. (Benton Early),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1922
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Ball, Carleton R. (Carleton Roy), - Rothgeb, Benton E. (Benton Early),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1918
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library