AL-FATLAWI, Suhaila Mohsen Kazem. The Factors Contributing to Wastage of Instructional Time as Perceived by Principals of Popular Schools in Derna . Al-Mukhtar Journal of Social Sciences, [S. l.], v. 13, n. 1, p. 85–107, 2012. DOI: 10.54172/qv64dw34. Disponível em: https://mdp.omu.edu.ly/journals/index.php/mjssc/article/view/392. Acesso em: 16 dec. 2025.