@misc{Letronne_Antoine_Jean_(1787-1848)_Brief,
 author={Letronne, Antoine Jean (1787-1848) and Humboldt, Alexander von (1769-1859)},
 howpublished={online},
 language={fre},
 type={rękopis},
 title={Brief von Antoine Jean Letronne an Alexander von Humboldt},
 keywords={rękopisy},
}