@misc{Lehmann_Jacob_Heinrich_Wilhelm_(1800-1863)_Brief,
 author={Lehmann, Jacob Heinrich Wilhelm (1800-1863) and Humboldt, Alexander von (1769-1859)},
 howpublished={online},
 language={ger},
 type={rękopis},
 title={Brief von Jacob Heinrich Wilhelm Lehmann an Alexander von Humboldt},
 keywords={rękopisy},
}