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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Guo, Xiao-Si - Li, Bin
    Type: Article
    In: American fern journal
    Volume: 96
    Date: 2006
    Page Range: 80--82
    Publication Info: [Washington, etc.] American Fern Society
  2. By: Guo, Xiao-Si - Li, Bin
    Type: Article
    In: American fern journal
    Volume: 99
    Date: 2009
    Page Range: 244--248
    Publication Info: [Washington, etc.] American Fern Society