Immagine:Humboldt.jpg - Citazioni

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description: Alexander von Humboldt
Source: http://www.lib.utexas.edu/photodraw/portraits/ Duyckinick, Evert A. Portrait Gallery of Eminent Men and Women in Europe and America. New York: Johnson, Wilson & Company, 1873.
Painter: Julius Schrader

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Alexander von Humboldt