Asmar, SamirGunawardana, A.M.T.Nikehetiya, S.B.R.Wijayaratna, C.M.Agrarain Research and Training Institute2014-07-182014-07-181977https://dl-harti.nsf.gov.lk//handle/1/2136vi, 22p.Agricultural EducationTrainingExtensionSri LankaEducation and training of agricultural extension personnel in Sri Lanka