@misc{Humboldt_Alexander_von_(1769-1859)_Brief, author={Humboldt, Alexander von (1769-1859) and Argelander, Friedrich Wilhelm August (1799-1875)}, howpublished={online}, language={ger}, language={fre}, title={Brief von Alexander von Humboldt an Johann Carl Eduard Buschmann}, type={rękopis}, keywords={rękopisy}, }