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Humboldt, Alexander von (1769-1859) (253)
Buschmann, Johann Carl Ed. (1805-1880)(10)
Arago, Dominique François (1786-1853)(3)
Humboldt, Alexander von (1769-1859) (253)
Buschmann, Johann Carl Ed. (1805-1880)(10)
Arago, Dominique François (1786-1853)(3)