{"id":"001233585","type":"book","title":"Zwischen Polen, Russen und Balten: die frühmittelalterliche Burg von Sypniewo in Masowien","pages":"617-635","container-title":"Archäologisches Korrespondenzblatt, 31,4 (2001","author":[{"family":"Biermann","given":"Felix."}],"issued":{"raw":"2001"}}