OROYE-OKPOUDHU, R. Zino. Mechanisms Used By School Principals to Achieve Effective Instructional Supervision in Delta State Public Secondary Schools, Nigeria. Journal of Research in Education and Society (JRES) , [S. l.], v. 10, n. 3, p. 133–143, 2019. Disponível em: http://icidr.org.ng/index.php/Jres/article/view/1495. Acesso em: 19 sep. 2024.