APA
Kassam A., . (1991). Agro-ecological land resources assessment for agricultural development planning. A case study of Kenya. Resources data base and land productivity. Technical Annex 4:Crop productivity. : .
Chicago
Kassam A.H, . 1991. Agro-ecological land resources assessment for agricultural development planning. A case study of Kenya. Resources data base and land productivity. Technical Annex 4:Crop productivity. : .
Harvard
Kassam A., . (1991). Agro-ecological land resources assessment for agricultural development planning. A case study of Kenya. Resources data base and land productivity. Technical Annex 4:Crop productivity. : .
MLA
Kassam A.H, . Agro-ecological land resources assessment for agricultural development planning. A case study of Kenya. Resources data base and land productivity. Technical Annex 4:Crop productivity. : . 1991.