(3GdaGQhb (B/s - (3THdj GdfYeGfj(B: (3eMeO(B:s 1857-1914; (3GHQGgje, SejQ YHO GdMejOs (Riyad : Dar Salam, 1998)
Keywords: 'Umar ibn al-Khattab, -- Caliph, -- d. 644; Caliphs -- Biography; Islamic Empire -- Biography