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  1. By: Wirth, Michael - Hale, Mason Ellsworth, Jr.,
    Publication info: Washington, Smithsonian Institution Press, 1978
    Holding Institution: Smithsonian Libraries and Archives
  1. By: Wirth, Michael - Hale, Mason Ellsworth, Jr.,
    Type: Article
    In: Contributions from the United States National Herbarium
    Volume: 36
    Date: 1983
    Page Range: 63--119
    Publication Info: Washington, D.C, Smithsonian Institution Press, 1890-
  2. By: Hale, Mason Ellsworth, Jr., - Wirth, Michael
    Type: Article
    In: Phytologia
    Volume: 22
    Date: 1971
    Page Range: 36--40
    Publication Info: Bronx Park, New York H.A. Gleason and H.N. Moldenke