(3GdNdjaI GdRGgO YeQ Hf YHO GdYRjR (B/s - (3SjO GdCgd, YHO GdYRjRs (al-Qahirah : Majlis al-A'la lishshu'un al-Islamiyah, 1964)
Keywords: 'Umar ibn'Abd al-'Aziz, -- Caliph, -- d. 720