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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Bennert, H. Wilfried, - Suksathan, Piyakaset - Horn, Karsten
    Type: Article
    In: American fern journal
    Volume: 97
    Date: 2007
    Page Range: 155--165
    Publication Info: [Washington, etc.] American Fern Society