Chandrasiri, J.K.M.D.; Jayatissa, R.L.N.; Hector Kobbekaduwa Agrarian Research and Training Institute(Hector Kobbekaduwa Agrarian Research and Training Institute:Colombo, 2013)
Chandrasiri, J.K.M.D.; Hector Kobbekaduwa Agrarian Research and Training Institute(Hector Kobbekaduwa Agrarian Research and Training Institute:Colombo, 2005)