{"id":"001031406","type":"book","title":"Die frühmittelalterliche Hauptburg Płock in Masowien","publisher":"Hermann Böhlaus Nachfolger","publisher-place":"Weimar","pages":"82-89","container-title":"Frühe polnische Burgen : Berichte über archäologische Grabungen","author":[{"family":"Szafrański","given":"Włodzimierz 1920-1998"}],"issued":{"raw":"1960"}}