AFOLABI, B. W. .; JAMES , T. O.; ONWUKA , . G. I.; YUNUSA , K. G. Using a Modified Quality Control Charts on Academic Grades of Tertiary Institutions Students. International Journal of Science for Global Sustainability, [S. l.], v. 9, n. 4, p. 40–46, 2023. DOI: 10.57233/ijsgs.v9i4.547. Disponível em: https://fugus-ijsgs.com.ng/index.php/ijsgs/article/view/547. Acesso em: 16 apr. 2026.