{"id":"000934006","type":"book","title":"Płock we wczesnym średniowieczu","publisher":"Zakład Narodowy Imienia Ossolińskich","publisher-place":"Wrocław/Warszawa/Kraków/Gdańsk/Łód","author":[{"family":"Szafrański","given":"Włodzimierz 1920-1998"}],"issued":{"raw":"1983"}}