Almas Naimanbaev, Kenan Koch, Y. T. Y. A. B. S. R. S. (2019). The Problem Of Elimination Of Illiteracy By Writing Textbooks In The Steppe. Opción, 35(88), 543-566. Recuperado a partir de https://produccioncientificaluz.org/index.php/opcion/article/view/24216