Covenants of the Prophet MuḥammadIbrahim Mohamed Zein, Ahmed El-Wakil · First published 2022Open the Tome
A hundred years of the University of Khartoum, 1902-2002Zein A. Ibrahim · First published 2007Open the Tome
Islam, Christian missions, and the colonial administration in East AfricaIbrahim El-Zein Soghayroun · First published 1992Open the Tome
The Omani & South Arabian Muslim factor in East AfricaIbrahim El-Zein Soghayroun · First published 1984Open the Tome
