@misc{Lignon_Etienne_Frédéric_[Fryderyk,
 author={Lignon, Etienne Frédéric},
 howpublished={online},
 title={[Fryderyk Wilhelm IV]},
 keywords={portrait, man, bust, king, german graphics, engraving, Fryderyk Wilhelm IV (1795-1861), 19 w., 19. Jh., 19 century, Lignon, Etienne Frederic (1779-1833), Steuben, Charles Auguste Guillaume Henri Francois Louis (1788-1856)},
}