Ngegba, M., Mugasha, A., Chamshama, S. and Kimaro, A. (2007) “<i>Tephrosia</i> biomass yield and soil fertility in one season relay intercropping with maize in Semiarid Gairo, Tanzania”, Discovery and Innovation, 19(1-2), pp. 25–35. doi: 10.4314/dai.v19i1-2.15769.