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By "Schneebeli-Graf, Ruth "
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Illustrierter Leitfaden zum Bestimmen der Farne und farnverwandten Pflanzen der Schweiz und agrenzender Gebiete
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By: Yatskievych, George Alfred - Kopp, Eugen - Schneebeli-Graf, Ruth
Type: Article
In: American fern journal
Volume: 89
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Date: 1999
Page Range: 270--271
Publication Info: [Washington, etc.] American Fern Society
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