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Humboldt, Alexander von (1769-1859) (1608)
Boussingault, Jean-Baptiste (1802-1887)(50)
Galle, Johann Gottfried (1812-1910)(33)
Humboldt, Alexander von (1769-1859) (1608)
Boussingault, Jean-Baptiste (1802-1887)(50)
Galle, Johann Gottfried (1812-1910)(33)