@misc{Ideler_Julius_Ludwig_(1809-1842)_Brief,
 author={Ideler, Julius Ludwig (1809-1842) and Humboldt, Alexander von (1769-1859)},
 howpublished={online},
 language={ger},
 language={fre},
 type={rękopis},
 title={Brief von Julius Ludwig Ideler an Alexander von Humboldt},
 keywords={rękopisy},
}