OLOWO, Busuyi Francis. Principals’ supervisory skills: Precursor of teachers’ morale and instructional delivery in southwestern Nigerian secondary schools. Educational Management and Advancement Journal, [S. l.], v. 1, n. 1, p. 19–26, 2026. Disponível em: https://journal.kadewaguru.org/index.php/EduMAJ/article/view/53. Acesso em: 4 aug. 2026.