Selvananthan, S.Sivaganesh, S.Vairavanathan, S.Surenthirakumaran, R.Balakumar, S.2019-03-052019-03-052018-06The Ceylon Medical Journal, 63(2):p.68-71https://dl.nsf.gov.lk/handle/1/24462Betel chewingBus driversJaffna districtBetel chewing among bus drivers in Jaffna districtArticle