{"id":"001001947","type":"book","title":"Ports and trade in Norway during the transition to historical time","publisher":"The Viking Ship Museum, Roskilde","publisher-place":"Roskilde","pages":"159-170","container-title":"Aspects of maritime Scandinavia AD 200-1200. Proceedings of the Nordic Seminar on Maritime Aspects of Archaeology, Roskilde, 13th-15th march, 1989","author":[{"family":"Christophersen","given":"Axel"}],"issued":{"raw":"1991"}}