Archaeologia Historica Polona. Tom 8. Źródła archeologiczne i ich treści - Wojciech Chudziak

Lech Leciejewicz: The Origins of the Conflict between the Pomeranians and the Early Polish State in the l0th and 11th Centuries Wojciech Chudziak: The Formation of Tribal Divisions in the Chełmno-Dobrzyń Zone in the Early-Middle Ages