@misc{Humboldt_Alexander_von_(1769-1859)_Humboldt,,
 author={Humboldt, Alexander von (1769-1859)},
 howpublished={online},
 title={Humboldt, Alexander von (1769-1859), Briefe an Eduard Buschmann},
 type={rękopis},
 keywords={rękopisy},
}