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By: Ashcroft, Carl J - Sheffield, ElizabethType: ArticleIn: American fern journalVolume: 90Series:Issue:Date: 2000Page Range: 91--99Publication Info: [Washington, etc.] American Fern SocietySubjects:
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By: Raine, Catherine A - Farrar, Donald R., - Sheffield, ElizabethType: ArticleIn: American fern journalVolume: 81Series:Issue:Date: 1991Page Range: 109--118Publication Info: [Washington, etc.] American Fern SocietySubjects:
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By: Simán, Sanna E - Sheffield, ElizabethType: ArticleIn: American fern journalVolume: 92Series:Issue:Date: 2002Page Range: 30--38Publication Info: [Washington, etc.] American Fern SocietySubjects: