@misc{_[Mueller,
 address={[s.l.]},
 howpublished={online},
 language={ger},
 title={[Mueller (zu Sylfeldten) Johann von]},
 keywords={18thC., 19thC., German graphics, copperplate, engraving, portrait, man, bust, clothing, historian, librarian, man of letters, Mueller, Johannes von (1752-1809), Wien},
}