Onyeji, S.C. <https://pure.iiasa.ac.at/view/iiasa/2263.html>, Fischer, G. <https://pure.iiasa.ac.at/view/iiasa/89.html>, & Kamau, W.  (1996).  Agro-Ecological Assessments for National Planning in Kenya: Database Structure for District Analysis.   IIASA Working Paper. IIASA, Laxenburg, Austria: WP-96-073