1. Accelerated Development in Sub-Saharan Africa;International Bank of Reconstruction and Development,1981
2. Food Problems and Prospects in sub-Saharan Africa: the Decade of the 1980's;United States Department of Agriculture, International Economics Division,1982
3. The evolving food situation;Paulino,1987
4. Agriculture: Toward 2000;FAO,1981
5. African Agriculture: The Next 25 Years;FAO,1986