Zmarzłowski, Krzysztof, and Piotr Jałowiecki. “EVALUATION OF DIFFERENTIATION IN HIGH SCHOOL EDUCATION SYSTEM IN POLAND IN 1999–2006”. Acta Scientiarum Polonorum. Oeconomia 7, no. 2 (June 30, 2008): 13-22. Accessed May 19, 2024. https://js.wne.sggw.pl/index.php/aspe/article/view/3774.