{"id":"001064744","type":"book","title":"Principles of trade and exchange: trade goods and merchants","publisher":"The Viking Ship Museum, Roskilde","publisher-place":"Roskilde","pages":"294-308","container-title":"Wulfstan's voyage : The Baltic Sea region in the early Viking Age as seen from shipboard","author":[{"family":"Steuer","given":"Heiko"}],"issued":{"raw":"2009"}}