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  1. By: Youngken, Heber W. (Heber Wilkinson),
    Publication info: Philadelphia :P. Blakiston's Son,c1938.
    Holding Institution: Missouri Botanical Garden, Peter H. Raven Library
    BHL Collections: Missouri Botanical Garden's Materia Medica
  2. By: Youngken, Heber W. (Heber Wilkinson),
    Edition: 2d ed., rev. and enl., with 195 illustrations.
    Publication info: Philadelphia :P. Blakiston's Son & Co.,[©1918]
    Holding Institution: The New York Academy of Medicine
    BHL Collections: Expanding Access to Biodiversity Literature
  3. By: Youngken, Heber W. (Heber Wilkinson), - Stewart, Francis Edward,
    Publication info: Philadelphia,P. Blakiston's son & co.[c1914]
    Holding Institution: Cornell University Library
  4. By: Youngken, Heber W. (Heber Wilkinson),
    Edition: Ed. 3, rev.
    Publication info: Philadelphia,Blakiston[1921]
    Holding Institution: University of Toronto - Gerstein Science Information Centre
  5. By: Youngken, Heber W. (Heber Wilkinson),
    Edition: 3d ed.
    Publication info: Philadelphia,P. Blakiston's son & co.[c1920]
    Holding Institution: Library of Congress
  1. By: Youngken, Heber W. (Heber Wilkinson),
    Type: Article
    In: Arnoldia
    Volume: 2
    Issue: 7
    Date: 1942
    Page Range: 37--40
    Publication info: Jamaica Plain, Mass.,Arnold Arboretum, Harvard University