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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Swinson, Carl R. (Carl Robert), - Funk, W. C. (Warren Clemmer),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1926
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Swinson, Carl R. (Carl Robert),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1927
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library