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By: Klekowski, Edward J - Poppel, David MType: ArticleIn: American fern journalVolume: 66Series:Issue:Date: 1976Page Range: 75--79Publication Info: [Washington, etc.] American Fern SocietySubjects:
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By: Klekowski, Edward JType: ArticleIn: Annals of the Missouri Botanical GardenVolume: 59Series:Issue:Date: 1972Page Range: 138--151Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-Subjects: