{"id":"001018199","type":"book","title":"50 lat badań w Biskupinie","publisher-place":"Warszawa","pages":"81-105","container-title":"Prahistoryczny gród w Biskupinie : Problematyka osiedli obronnych na początku epoki żelaza","author":[{"family":"Piotrowski","given":"Wojciech"}],"issued":{"raw":"1991"}}