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Walker, D. ,  Haile, Alemseged Tamiru ,  Gowing, J. ,  Forsythe, N. ,  Parkin, G. ,  [Guideline: selection, training and managing para-hydrologists] ,  Guideline: selection, training and managing para-hydrologists

Asiwe, J. ,  Adekunle, A. ,  Fatunbi, A.O. ,  Chovwen, A. ,  [Growing cowpea commercially in Nigeria: a training manual] ,  Growing cowpea commercially in Nigeria: a training manual

Ibikunle, O. ,  Adekunle, A. ,  Fatunbi, A.O. ,  [Growing maize commercially in Nigeria: an illustrated guide] ,  Growing maize commercially in Nigeria: an illustrated guide