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. AJHCER [Internet]. 2023 Mar. 31 [cited 2026 Oct. 27];10(1):175-8. Available from: https://publications.afropolitanjournals.com/index.php/ajhcer/article/view/350