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