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https://update.library.uitm.edu.my/Record/Mohd%20Daud%20S.M.S.;%20Mohd%20Yusof%20M.Y.P.;%20Heo%20C.C.;%20Khoo%20L.S.;%20Chainchel%20Singh%20M.K.;%20Mahmood%20M.S.;%20Nawawi%20H.