@misc{Klaproth_Heinrich_Julius_(1783-1835)_Brief,
 author={Klaproth, Heinrich Julius (1783-1835) and Humboldt, Alexander von (1769-1859)},
 howpublished={online},
 language={fre},
 type={rękopis},
 title={Brief von Heinrich Julius Klaproth an Alexander von Humboldt},
 keywords={rękopisy},
}