KALENDAROVA ZARAFSHAN KALBAEVNA; D. A ABDURAHMANOVA. DEVELOPMENT OF THINKING OPERATIONS OF PRESCHOOL AND PRIMARY EDUCATION CHILDREN. International Engineering Journal For Research & Development, [S. l.], v. 6, n. ISPCIEI, p. 3, 2021. DOI: 10.17605/OSF.IO/RBNQ2. Disponível em: http://www.iejrd.com/index.php/iejrd/article/view/2066. Acesso em: 19 apr. 2026.