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Ellis-Jones, J. ,  Schulz, S. ,  Chikoye, D. ,  Haan, N. de ,  Kormawa, P.M. ,  Adedzwa, D. ,  [Participatory research and extension approaches: IITA research guide, No. 71] ,  Participatory research and extension approaches: IITA research guide, No. 71

Emechebe, A. ,  Ellis-Jones, J. ,  Schulz, S. ,  Chikoye, D. ,  Douthwaite, Boru ,  Kureh, I ,  Tarawali, G. ,  Hussaini, M.A. ,  Kormawa, P.M. ,  Sanni, AO ,  [Farmers´ perception of the striga problem and its control in Northern Nigeria] ,  Farmers´ perception of the striga problem and its control in Northern Nigeria

Kormawa, P.M. ,  Ezedinma, C. ,  Singh, B. ,  [Factors influencing farmer-to-farmer transfer of an improved cowpea variety in Kano State, Nigeria] ,  Factors influencing farmer-to-farmer transfer of an improved cowpea variety in Kano State, Nigeria

Emechebe, A.M. ,  Ellis-Jones, J. ,  Schulz, S. ,  Chikoye, D. ,  Douthwaite, Boru ,  Kureh, I. ,  Tarawali, G. ,  Hussaini, M.A. ,  Kormawa, P.M. ,  Sanni, A. ,  [Farmer perception of the Striga problem and its control in northern Nigeria] ,  Farmer perception of the Striga problem and its control in northern Nigeria