HESHAM HAYEL ABDULWAHED MOHAMMED; AMEEN MAHYOUB AHMED SHELIRYAN. The Degree of Effectiveness of School Administration and it’s Relationships to Investment Times in Public and Private Secondary Schools in Aden Governorate. Journal of the Faculties of Education - University of Aden, [S. l.], v. 17, n. 2, p. 394–420, 2023. Disponível em: https://jef.adenuniv.net/index.php/jef/article/view/29. Acesso em: 7 feb. 2025.