{"id":"001064738","type":"book","title":"Transport zones in Wulfstan's days","publisher":"The Viking Ship Museum, Roskilde","publisher-place":"Roskilde","pages":"206-219","container-title":"Wulfstan's voyage : The Baltic Sea region in the early Viking Age as seen from shipboard","author":[{"family":"Westerdahl","given":"Christer"}],"issued":{"raw":"2009"}}