@misc{iiasa4025,
           title = {Agro-Ecological Land Resources Assessment for Agricultural Development Planning: A Case Study for Kenya. Resources Data Base and Land Productivity: Technical Annex 8: Crop Productivity Assessment: Results at District Level},
         address = {IIASA, Laxenburg, Austria},
       publisher = {XQ-94-805},
            year = {1994},
             url = {https://pure.iiasa.ac.at/id/eprint/4025/},
          author = {Fischer, G. and Shah, M. M. and Kassam, A. H. and van Velthuizen, H. T.}
}