@book{cbdu12060,
           title = {Kurze Beschreibung der k{\"o}niglichen polnischen Kr{\"o}nung},
          number = {1206},
         address = {Wroc{\l}aw},
       publisher = {[B. dr.]},
             url = {http://cbdu.ijp.pan.pl/id/eprint/12060/}
}