1. The economics of labour supply for cotton picking in the Blue Nile Agricultural Corporation;Ahmed,1986
2. Change among West African settlers in Northern Sudan;Duffield,1983
3. Some socio-economic factors affecting labour availability in the Gezira Scheme;El Amin,1981
4. Some socio-economic characteristics of the Gezira Tenants;El Hadri,1967
5. Western migration and settlement in the Gezira;Hassoun;Sudan Notes and Records,1952