Senanayaka, R.M.N.H.Wijesena, K.A.K.Ilangakoon, I.W.M.I.W.T.K.Udawela, U.A.K.S.De Silva, N.P.S.Gunapalla, K.R.D.2023-02-202023-02-202022-10https://dl-doa.nsf.gov.lk/handle/1/779512otherOld improved varieties of RiceNew improved varieties of RiceRicevariety releasing processRRDIBreedingRice land raceBook