2010 · Okechukwu, R.U., Akoroda, M.O., et al. · CGSPace A Repository of Agricultural Research Outputs (Consultative Group for International Agricultural Research)
2005 · Dixon, A., Okechukwu, R.U., et al. · CGSPace A Repository of Agricultural Research Outputs (Consultative Group for International Agricultural Research)
2005 · Dixon, A., Okechukwu, R.U., et al. · CGSPace A Repository of Agricultural Research Outputs (Consultative Group for International Agricultural Research)
2005 · Dixon, A., Okechukwu, R.U., et al. · CGSPace A Repository of Agricultural Research Outputs (Consultative Group for International Agricultural Research)