Maḥmūd ʻAbd Allāh Ibrāhīm ʻUbaydī

• Banū Shaybān wa-dawruhum fī al-tārīkh al-ʻArabī wa-al-Islāmī ḥattā maṭlaʻ al-ʻaṣr al-Rāshidī