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Wuppertal: Graphium-Press, 1994
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México: Fondo de Cultura Económica, 1997
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(Hamburg: Geographische Gesellschaft), 1964
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Stanford, Calif.: Stanford Univ. Press, 1980
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Lewiston, NY; Queenston, Ont.; Lampeter: Mellen, 2002
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Berkeley [u.a.]: Univ. of California Press, 1998
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New York [u.a.]: Time-Life, 1984
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Jena: Fischer, 1916
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1932
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Hannover : Universität, 2004
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Mexiko
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Springer Science and Business Media LLC, 1915
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International Bureau for Plant Taxonomy and Nomenclature, 2006