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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Warren, Cora L.
    Type: Article
    In: Arnoldia
    Volume: 37
    Issue: 6
    Date: 1977
    Page Range: 285--288
    Publication Info: Jamaica Plain, Mass Arnold Arboretum, Harvard University
  2. By: Warren, Cora L.
    Type: Article
    In: Arnoldia
    Volume: 39
    Issue: 5
    Date: 1979
    Page Range: 311--326
    Publication Info: Jamaica Plain, Mass Arnold Arboretum, Harvard University