{"id":"001047458","type":"book","title":"Seafaring in the North Sea region, AD 250-850","publisher":"Fries Museum, Leeuwarden","publisher-place":"Leeuwarden","pages":"55-66","container-title":"Kings of the North Sea, AD 250-850","author":[{"family":"Rieck","given":"Flemming"}],"issued":{"raw":"2000"}}