Browsing by Author "Nikahetiya, S.B.R."
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Item The effectiveness of agricultural extension methodology(Hector Kobbekaduwa Agrarian Research and Training Institute:Colombo, 1977) Nikahetiya, S.B.R.; Gunawardena, A.T.M.; Asmar, Samir; Wijeratne, C.M.; Agrarian Research and Training InstituteItem Social science research methodology:a manual for social science researchers(Hector Kobbekaduwa Agrarian Research and Training Institute:Colombo, 1984) O'reilly, J.P.; Nikahetiya, S.B.R.; Hector Kobbekaduwa Agrarian Research and Training Institue