PIBER-ZBIERANOWSKA, Marta. The Duchy of Mazovia on the eve of incorporation. Characteristic of the territory circa 1526 (its northern part). Studia Geohistorica. Online. 10 March 2023. No. 10, pp. 7-27. [Accessed 23 July 2024]. DOI 10.12775/SG.2022.01.