AZLARKHON MAGBARHONOVICH TILLABOYEV. THE PRINCIPLE OF VARIABILITY IN TEACHING AN ASTRONOMY COURSE. European Science Methodical Journal, [S. l.], v. 2, n. 6, p. 562–565, 2024. Disponível em: https://europeanscience.org/index.php/3/article/view/792. Acesso em: 3 jul. 2024.