Local or imported? The origin of the raw material used in manufacturing bricks from castles of the Teutonic knights in north-central Poland and their significance to our understanding of medival construction techniques - Wiewióra, Marcin; Bartz, Wojciech; Łukaszewicz, Jadwiga; Witkowska, Karolina (Oxford University, Research Laboratory for Archaeology and the History of Art, 2024)