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  1. By: Levy, F
    Type: Article
    In: Zoologischer Anzeiger
    Volume: 41
    Date: 1912
    Page Range: 87--90
    Publication Info: Jena VEB Gustav Fischer Verlag
  2. By: Levy, F - Wilbur, Robert L.
    Type: Article
    In: Rhodora
    Volume: 92
    Date: 1990
    Page Range: 17--21
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  3. By: Moore, D - Mullins, D - Levy, F
    Type: Article
    In: Rhodora
    Volume: 96
    Date: 1994
    Page Range: 311--326
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],