ORAPIN SUKYOS; PORNSIRI SANTUM. Determining Childhood Learning from Various Kind Formulas of Soft-Prepared Chalk. Journal of Educational Issues, [S. l.], v. 8, n. 2, p. pp. 304–313, 2024. DOI: 10.5296/jei.v8i2.20064. Disponível em: https://macrojournal.org/index.php/jei/article/view/1235. Acesso em: 23 nov. 2024.