Soldiers, Traders and Slaves: State Formation and Economic Transformation in the Greater Nile Valley 1700-1885 Ismail Abdullah, Janet J. Ewald, Ladislav Holy, Lina Fruzzetti, Akos Östör • 1992
The Waters of the Nile: An Annotated Bibliography Ismail Abdullah, Robert O. Collins, M. W. Daly, John O. Voll, Peter Woodward • 1992