{"id":"001022273","type":"book","title":"North Holland AD 400-1200: turning tide or tide turned?","publisher":"Van Gorcum","publisher-place":"Assen","pages":"91-120","container-title":"Medieval archaeology in the Netherlands. Studies presented to H.H. van Regteren Altena","author":[{"family":"Besteman","given":"J. C."}],"issued":{"raw":"1990"}}