الماس ع. ع. ص.; البكري س. ا. م. THE DEGREE OF POSSESSION OF 21ST CENTURY SKILLS AMONG SECONDARY SCHOOL MATHEMATICS TEACHERS IN RADFAN DISTRICTS. Electronic Journal of University of Aden for Humanity and Social Sciences, [S. l.], v. 7, n. 1, p. 154–170, 2026. DOI: 10.47372/ejua-hs.2026.1.519. Disponível em: https://ejua.net/index.php/EJUA-HS/article/view/519. Acesso em: 13 apr. 2026.