Asqarova , Saidaxon. “MАTNSHUNОS ОLIM Y. E. BERTELS VА UNING ILMIY MERОSI”. Educational Research in Universal Sciences 2, no. 5 SPECIAL (June 24, 2023): 593–597. Accessed November 22, 2024. http://erus.uz/index.php/er/article/view/3206.