{"id":"001017476","type":"book","title":"Fornminnesområdet Björkö","publisher":"Kungl. Boktryckeriet P.A. Norstedt och Söner","publisher-place":"Stockholm","pages":"33-39","container-title":"Ansgars Birka : En vikingatida handelsplats","author":[{"family":"Janson","given":"Sverker"}],"issued":{"raw":"1965"}}