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Humboldt, Alexander von (1769-1859) (19)
Buschmann, Johann Carl Ed. (1805-1880)(2)
Göppert, Heinrich (1800-1884)(2)
Humboldt, Alexander von (1769-1859) (19)
Buschmann, Johann Carl Ed. (1805-1880)(2)
Göppert, Heinrich (1800-1884)(2)