{"id":"001059762","type":"book","title":"\"Tribal\" societies and the rise of early medieval trade: archaeologial evidence from Polish territories (eighth-tenth centuries)","publisher":"de Gruyter","publisher-place":"Berlin/New York","pages":"431-450","container-title":"Post-Roman towns, trade and settlement in Europe and Byzantium : 1. The heirs of the Roman West","author":[{"family":"Buko","given":"Andrzej"}],"issued":{"raw":"2007"}}