{"id":"000989798","type":"book","title":"Sperren oder Öffnungen? Drei Burgen an den Grenzen Schwedens im 14","publisher":"Centre de Recherches Archéologiques Médiévales","publisher-place":"Caen","pages":"61-68","container-title":"Château Gaillard. 17. Études de Castellologie Médiévale. Actes du Colloque International tenu à Abergavenny, Wales, 29 août-3 septembre 1994","author":[{"family":"Drake","given":"Knut"}],"issued":{"raw":"1996"}}