Meleshko В. В. . LEVEL DIFFERENTIATION IN THE IMPLEMENTATION OF THE CONTENT OF EDUCATION BY MEANS OF A MANUAL IN THE SMALL RURAL ELEMENTARY SCHOOL. Problems of the modern textbook, [S. l.], n. 14, p. 435–445, 2014. Disponível em: https://ipvid.org.ua/index.php/psp/article/view/564. Acesso em: 19 may. 2024.