{"id":"001277799","type":"book","title":"Die Lübecker Burg- und Stadtbefestigungen des 12. und 13. Jahrhunderts","pages":"227-234","container-title":"Archäologisches Korrespondenzblatt, 20,2 (1990","author":[{"family":"Gläser","given":"Manfred 1949-"}],"issued":{"raw":"1990"}}