Zmarzłowski, K., & Jałowiecki, P. (2008). EVALUATION OF DIFFERENTIATION IN HIGH SCHOOL EDUCATION SYSTEM IN POLAND IN 1999–2006. Acta Scientiarum Polonorum. Oeconomia, 7(2), 13-22. Retrieved from https://js.wne.sggw.pl/index.php/aspe/article/view/3774