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  1. By: Walton, G. P. (George Pelham), - Bidwell, George Leslie,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1923
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Walton, G. P. (George Pelham),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1923
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Walton, G. P. (George Pelham), - Gardiner, R. F. (Robert Franklin),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1926
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  1. By: Walton, G. P. (George Pelham),
    Type: Article
    In: Botanical gazette
    Volume: 74
    Issue: 2
    Date: 1922
    Page Range: 158--173
    Publication Info: Hanover, Ind, [publisher not identified], 1876-1991