Kowalczyk, Anna, Olga Dąbska, Martyna Warchoł, and Rafał Gotowski. “Drug Addiction Problem in Poland in Relation to International Comparisons”. Journal of Education, Health and Sport 7, no. 5 (May 30, 2017): 766–780. Accessed June 19, 2024. https://apcz.umk.pl/JEHS/article/view/4663.