1. Research on Agricultural Development in Sub-Saharan Africa: A Critical Survey;Eicher;MSU International Development Paper No. 1,1982
2. Efficiency of Resource Use Under Small-Scale Irrigation Technology in Nigeria;Erhabor,1982
3. River basin development in northern Nigeria: a case study of Bakolori Project;Etuk,1992
4. Agricultural management strategy in an arid environment;Fada;J. Arid Agric.,1988