OSSAI, A.G.; ICHAZU KINGSLEY. Principals` Instructional Supervision and the Academic Performance of Secondary School Students in Oshimili North Local Government Area of Delta State, Nigeria. African Journal of Humanities and Contemporary Education Research , [S. l.], v. 10, n. 1, p. 175–185, 2023. Disponível em: https://publications.afropolitanjournals.com/index.php/ajhcer/article/view/350. Acesso em: 27 oct. 2026.