Nasilloyev Sunnat Shavkat ogli. THE NATURE OF THE POSTGRADUATE EDUCATION SYSTEM IN HIGHER EDUCATIONAL INSTITUTIONS OF THE UZBEK SSR UNDER THE SOVIET GOVERNMENT. ReFocus [Internet]. 2025 Apr. 5 [cited 2025 Dec. 21];4(3):33-5. Available from: https://refocus.uz/index.php/1/article/view/1501