Book
Agroforestry In Sub-Saharan Africa: A Farmer's Perspective. World Bank Technical Paper No. 112. Washington, DC: World Bank. http://www.worldcat.org/oclc/20630167.
. 1989. Community Forestry: Herders' Decision-Making In Natural Resources Management In Arid And Semi-Arid Africa. Community Forestry Note No. 4. Rome: Food and Agriculture Organization of the United Nations. http://www.fao.org/3/t6260e/t6260e00.htm.
. 1990. Soil And Water Conservation In Sub-Saharan Africa: Towards Sustainable Production By The Rural Poor: A Report. Amsterdam: International Fund for Agricultural Development (IFAD). http://www.worldcat.org/oclc/30624582.
. 1992. Conference Paper
“Notes And Reflections On The Workshop On Farmers And Agricultural Research: Complementary Methods”. In Paper Presented At Ids Workshop On Farmers And Agricultural Research: Complementary Methods, July 26-31, 1987, University Of Sussex. University of Sussex: Brighton, UK.
. 1987.