@misc{Ritter_Carl_(1779-1859)_Brief,
 author={Ritter, Carl (1779-1859) and Humboldt, Alexander von (1769-1859)},
 howpublished={online},
 language={ger},
 title={Brief von Carl Ritter an Alexander von Humboldt},
 type={rękopis},
 keywords={rękopisy},
}