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By: Petersen, Raymond L - Francis, Patrick CType: ArticleIn: American fern journalVolume: 70Series:Issue:Date: 1980Page Range: 115--118Publication Info: [Washington, etc.] American Fern SocietySubjects:
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By: Petersen, Raymond L - Fairbrothers, David E.Type: ArticleIn: American fern journalVolume: 70Series:Issue:Date: 1980Page Range: 93--95Publication Info: [Washington, etc.] American Fern SocietySubjects:
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By: Petersen, Raymond L - Fairbrothers, David E.Type: ArticleIn: American fern journalVolume: 70Series:Issue:Date: 1980Page Range: 73--78Publication Info: [Washington, etc.] American Fern SocietySubjects: