{"id":"001001768","type":"book","title":"Zur Entwicklung der Stadtbefestigungen im 13","publisher":"Böhlau","publisher-place":"Köln/Weimar/Wien","pages":"91-110","container-title":"Die Befestigung der mittelalterlichen Stadt","author":[{"family":"Biller","given":"Thomas."}],"issued":{"raw":"1997"}}