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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Grave, B. H. (Benjamin Harrison), - Walker, Ernest P. (Ernest Pillsbury),
    Publication info: [Laramie], University of Wyoming, 1913
    Holding Institution: MBLWHOI Library
  2. By: Ashbrook, F. G. (Frank Getz), - Walker, Ernest P. (Ernest Pillsbury),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1925
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Grave, B. H. (Benjamin Harrison), - Walker, Ernest P. (Ernest Pillsbury),
    Publication info: Laramie, Wyoming, 1916
    Holding Institution: Cornell University Library