БЫЧКОВА ЕЛЕНА СЕМЕНОВНА; СОРОКИНА Е.Д. RESEARCH OF PLAY ACTIVITY OF CHILDREN WITH MENTAL RETARDATION IN CONDITIONS OF PRESCHOOL EDUCATIONAL ORGANIZATION. International conferences, [S. l.], v. 1, n. 12, p. 5–9, 2022. Disponível em: https://www.psiped.ru/index.php/psi/article/view/84. Acesso em: 19 may. 2024.