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https://update.library.uitm.edu.my./Record/Bidin%20R.;%20Razak%20M.N.F.;%20Mohamad%20B.;%20Osman%20M.N.;%20Bakar%20M.S.A.;%20Tham%20J.S.;%20Atan%20R.;%20Handayati%20P.;%20Utaberta%20N.
https://update.library.uitm.edu.my./Record/Bidin%20R.;%20Razak%20M.N.F.;%20Mohamad%20B.;%20Osman%20M.N.;%20Bakar%20M.S.A.;%20Tham%20J.S.;%20Atan%20R.;%20Handayati%20P.;%20Utaberta%20N.