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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Horton, J. R. (John Raymond),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1918
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Horton, J. R. (John Raymond),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1918
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Horton, J. R. (John Raymond), - Pemberton, C. E. (Cyril Eugene),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1915
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  4. By: Horton, J. R. (John Raymond), - Jones, P. R. (Paul Robert) - Russell, Harry Merwin,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, Bureau of Entomology, 1916
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library