Wanigaratne, R.D.Hector Kobbekaduwa Agrarian Research and Training Institute2014-07-182014-07-181978https://dl-harti.nsf.gov.lk//handle/1/2250v, 64p., glossaryCommunicationSri LankaInformationBroadcastingThe study of communication flow in selected village in Sri Lanka Nadu Odia and Ussan