@misc{_[Hardenberg,
 howpublished={online},
 publisher={Hel. u. Impr. Meisenbach Riffarth & Co, Berlin},
 language={ger},
 title={[Hardenberg Karl August, Fürst von]},
 keywords={portrait, man, bust, sculpture, Hardenberg, Karl August von (książę ; 1750-1822), https://viaf.org/viaf/4975077, Meisenbach-Riffarth & Co, Berlin, https://viaf.org/viaf/147207304, 20 w., 20. Jh., 20 century},
}