CONTENTO MINGA, Norma Elizabeth; AGUILAR GORDÓN, Floralba del Rocío. Metodology strategy for the development of preoperational thinking in the teaching of oral and written comprehension and expression in pre-school children. SAPERES UNIVERSITAS, [S. l.], v. 8, n. 1, p. 27–58, 2025. Disponível em: https://publishing.fgu-edu.com/ojs/index.php/RSU/article/view/560. Acesso em: 17 apr. 2026.