1.
Żytko M. OBUT (Nationwide Research on School Achievements of 9-Year Olds) - Pedagogical Experiment with "Policy Context". INSTED [Internet]. 2013 Dec. 31 [cited 2025 Jun. 30];16(4(64):101-16. Available from: https://insted-tce.pl/ojs/index.php/tce/article/view/135