02 The Comparative Effectiveness of Achievement in Mother Tongue and National Language in Arts and Science Subjects at Primary School Level 2. Journal of Gender and Social Issues, [S. l.], v. 12, n. 2, 2014. Disponível em: https://jgsi.fjwu.edu.pk/index.php/jgsi/article/view/285. Acesso em: 10 aug. 2026.