1. Sub-Saharan Africa: getting the facts straight.;Allison;IDS Bulletin,1985
2. Chambers , R. 1983 Rural Development: Putting the Last First. Longman, London
3. Cernea , M. 1985 Putting People First: Sociological Variables in Rural Development. Oxford University Press, New York
4. Hayami , Y. Ruttan , V. 1985 Agricultural Development: An International Perspective. Baltimore, John Hopkins University Press
5. Richards , P. 1985 Indigenous Agricultural Revolution. London, Hutchinson