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  1. By: Trost, John Francis,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1922
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  1. By: Noyes, H A - Trost, John Francis, - Yoder, L.
    Type: Article
    In: Botanical gazette
    Volume: 66
    Issue: 4
    Date: 1918
    Page Range: 364--373
    Publication Info: Hanover, Ind, [publisher not identified], 1876-1991