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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Barger, T. Wayne. - Cressler, Alan - Holt, Brian D - Medley, Max
    Type: Article
    In: American fern journal
    Volume: 100
    Date: 2010
    Page Range: 54--57
    Publication Info: [Washington, etc.] American Fern Society