Al-islām wa-'n-Nūba fī-'l-ʻuṣūr al-wusṭā - Musʿad, Muṣṭafā Muḥammad, (Dirāsāt fī tārīḫ as-Sūdān fī-l-ʻuṣūr al-wusṭā ;)