Zum Inhalt springen
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Richmond: Royal Botanic Gardens, Kew, 2012
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Bronx, N.Y.: New York Botanical Garden, 1989
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Chichester [u.a.]: Wiley, 1996
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Washington, DC, 1895 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2006
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Washington, DC, 1901 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2006
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JSTOR, 1996
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The Stationery Office, 1996
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JSTOR, 1984
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American Fern Society, 1984
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JSTOR, 1985
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American Fern Society, 1985
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Arnold Arboretum of Harvard University, 1982
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JSTOR, 1982
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American Fern Society, 1982
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JSTOR, 1981
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American Fern Society, 1981
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New England Botanical Club, 1966
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TRI COLOR PRINTERY LTD, 1962
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TRI COLOR PRINTERY LTD, 1962
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New England Botanical Club, 1961