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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Cox, H. R. (Herbert Randolph)
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1915
    Holding Institution: University of California Libraries
  2. By: Cates, J. S. (Junius Sidney), - Cox, H. R. (Herbert Randolph) - United States. Bureau of Plant Industry.
    Publication info: Washington, Govt. print. off, 1912
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library