The Effectiveness of Procedural Research in the Development of Life skills in the Light of the 21st century skills among Geography Teachers in the Republic of Yemen: history. Sana’a University Journal of Human Sciences, [S. l.], v. 2, n. 1, 2023. DOI: 10.59628/jhs.v2i1.114. Disponível em: https://journals.su.edu.ye/index.php/jhs/article/view/114. Acesso em: 4 may. 2026.