Kahor Tursunov, Ergash Makhmanov. “Methodology Forming The Concepts Of Astronomy And Cosmonautics In Initial Classes”. International Journal of Advanced Science and Technology 29, no. 9s (June 2, 2020): 6321 - 6325. Accessed May 7, 2024. http://sersc.org/journals/index.php/IJAST/article/view/20242.