@misc{_Poznań/Posen;,
 howpublished={online},
 publisher={Posen; Michaelis and Kantorowicz},
 language={ger},
 type={pocztówki},
 title={Poznań/Posen; Alter Markt (Sued-Seite); Stary Rynek},
 keywords={Poznań, Stary Rynek (Poznań)},
}