Siedlaczek-Szwed, Aleksandra. “EDUCATIONAL ACTIVITY IN THE SECOND REPUBLIC OF POLAND. THE OUTLINE OF ISSUES”. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference 1 (May 21, 2019): 472–479. Accessed May 4, 2024. https://journals.rta.lv/index.php/SIE/article/view/3693.