@misc{_[Hertzberg,,
 howpublished={online},
 publisher={[s.n.]},
 language={ger},
 title={[Hertzberg, Ewald Friedrich von]},
 type={rękopis},
 type={fotografia},
 keywords={Hertzberg Ewald Friedrich von 91725-1795), sztych, 18 w., portret},
}