@misc{_[Fryderyk,
 howpublished={online},
 language={ger},
 title={[Fryderyk Wilhelm III]},
 keywords={portrait, man, bust, king, german graphics, engraving, Fryderyk Wilhelm III (1770-1840), 18-19 w., 18.-19. Jh., 18-19 century},
}