%A A.H. Kassam %A H.T. van Velthuizen %A G. Fischer %A M.M. Shah %T Agro-Ecological Land Resources Assessment for Agricultural Development Planning: A Case Study for Kenya. Resources Data Base and Land Productivity: Technical Annex 7: Guide to Computer Programs for Land Productivity Assessments %C IIASA, Laxenburg, Austria %D 1994 %I XQ-94-804 %L iiasa4026