ABED ALTIF OMAR MOHAMED TAHA; MHASSEN SULIMAN AMER SULIMAN. The Impact of Strategic Planning on Project Efficiency and Effectiveness: An Applied Study on the General Secretariat of Strategic Planning in the Blue Nile Region. Eurasian Journal of Humanities and Education Research (EJHER), Libya, v. 2, n. 1, p. 44–68, 2026. Disponível em: https://eurasian-journals.com/index.php/ejher/article/view/36. Acesso em: 19 mar. 2026.