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  1. By: Roper, Jessie M - Hansen, S Kellon - Wolf, Paul G. - Karol, Kenneth G - Mandoli, Dina F - Everett, Karin D E - Kuehl, Jennifer V - Boore, Jeffrey L
    Type: Article
    In: American fern journal
    Volume: 97
    Date: 2007
    Page Range: 95--106
    Publication Info: [Washington, etc.] American Fern Society