REALIZATION OF THE CONTROL FUNCTION IN THE STRUCTURE OF TEXTBOOKS AND TEACHING AIDS IN THE PROCESS OF FUTURE FOREIGN LANGUAGE TEACHERS TRAINING AT THE TURN OF THE XXI CENTURY . 3 [Internet]. 2018 Jun. 25 [cited 2026 Sep. 15];(14). Available from: https://jrnls.ivet.edu.ua/3/article/view/555