{"id":"001172562","type":"book","title":"Sprawozdanie z badań weryfikacyjnych domniemanych grodzisk w dorzeczu Drwęcy przeprowadzonych w 1987 roku. Report on verification studies on supposed strongholds in the Drwęca basin carried out in 1987","pages":"21-44","container-title":"Archeologia (Toruń), 15 (1991","author":[{"family":"Chudziak","given":"Wojciech."}],"issued":{"raw":"1991"}}