{"id":"001011905","type":"book","title":"Aspects on barter trade exemplified at Helgö and Birka","publisher":"Akademisk Forlag","publisher-place":"København","pages":"189-194","container-title":"The archaeology of Gudme and Lundeborg. Papers presented at a Conference at Svendborg, october 1991","author":[{"family":"Arrhenius","given":"Birgit."}],"issued":{"raw":"1994"}}