ZYDEK, Sylwia. The Care and Educational Activity of Ursula Ledóchowska and the Ursuline Sisters of the Agonizing Heart of Jesus in the Polish Territories between 1920 and 1939. Paedagogia Christiana. Online. 15 January 2023. Vol. 49, no. 1, pp. 215-237. [Accessed 28 December 2025]. DOI 10.12775/PCh.2022.012.