Chandrasena, J.P.N.R.2010-07-062010-07-061989Journal of the National Science Council of Sri Lanka, 17(2):p.187-211https://dl.nsf.gov.lk/handle/1/6693WeedsFloristic compositionMonocotyledonsDicotyledonsAgricultureBiological SciencesA survey of rice-field weeds in Ratnapura and Kurunegala districts of Sri LankaArticle