Edirisinghe, U.Rajaguru, A.S.B.De Silva, M.2014-11-122014-11-121989Tropical Agricultural Research, 1:p.175-184https://dl.nsf.gov.lk/handle/1/11762FisheriesTilapiaAquacultureDetermination of the necessary quantity of supplementary fertilization for a duck-fish intergrated semi-intensive aquaculture systemA