Petroshchuk, Nataliia. “The Problem of Increasing of Teachers’ Qualification in Work of Congresses of Teachers in Ukraine (at the End of the XIX Century)”. Pedagogical Discourse0, no. 16 (March 10, 2014): 146-150. Accessed March 4, 2026. https://www.ojs.kgpa.org.ua/index.php/peddiscourse/article/view/382.