{"id":"001065446","type":"book","title":"The Early Medieval Circular Fortresses in the Province of Zeeland, The Netherlands: Ten Years After","publisher":"Wachholtz","publisher-place":"Neumünster","pages":"249-274","container-title":"Ringwälle und verwandte Strukturen des ersten Jahrtausends n. Chr. Internationales Symposium. Utersum auf Föhr 29. September - 1. Oktober 2005","author":[{"family":"Dierendonck","given":"Robert M. van"}],"issued":{"raw":"2009"}}