NASILLOYEV SUNNAT SHAVKAT OGLI. THE NATURE OF THE POSTGRADUATE EDUCATION SYSTEM IN HIGHER EDUCATIONAL INSTITUTIONS OF THE UZBEK SSR UNDER THE SOVIET GOVERNMENT. Research Focus International Scientific Journal, [S. l.], v. 4, n. 3, p. 33–35, 2025. DOI: 10.66073/researchfocus.v4i3.1501. Disponível em: https://refocus.uz/index.php/rf/article/view/1501. Acesso em: 7 aug. 2026.