إبراهيم عبد الله ر. Thee confrontation of the Khalefa Omar Bin Al-kattab ( to be satisfied with Allah ) to the crisis of ( Am Al-ramada ) 18A.H / 639A.D. BERJ [Internet]. 2012 Dec. 1 [cited 2025 Oct. 26];11(4):339-61. Available from: https://moss.uomosul.edu.iq/index.php/berj/article/view/39126