{"id":"001182680","type":"book","title":"Wijnaldum en Friesland in de vroege middeleeuwen: een opgraving in socio-politiek perspectief","pages":"89-92","container-title":"Paleo-Aktueel, 3 (1992","author":[{"family":"Besteman","given":"J. C."}],"issued":{"raw":"1992"}}