@misc{_Breslau,
 address={Breslau},
 howpublished={online},
 publisher={Grass, Barth & Comp. W. Friedrich},
 publisher={August Scherl Deutsche Adreßbuch-Gesellschaft},
 language={ger},
 title={Breslau},
 keywords={20 w., plany miast, Wrocław, kartografia, Breslauer Adressbuch},
}