Aigul, Primbetova, and Baltabayeva Gaukhar. “The Development Process of the Ecological Education in Independent Kazakhstan”. Journal of Intellectual Disability - Diagnosis and Treatment 8, no. 3 (October 14, 2020): 573–579. Accessed May 5, 2024. https://www.lifescienceglobal.com/pms/index.php/jiddt/article/view/6818.