1. Prospects and Trends of Irrigation in Africa;FAO,1984
2. Financing Adjustment with Growth in Sub-Saharan Africa, 1986–1990;The World Bank,1986
3. Crisis of Sustainability: Africa's Land Resource Base;FAO,1985
4. Stete of Irrigation — Facts and Figures;FAO,1986
5. Stete of Irrigation — Facts and Figures;FAO,1986