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https://update.library.uitm.edu.my./Record/Yunus%20R.M.;%20Hairi%20N.N.;%20Yuen%20C.W.;%20Hairi%20F.;%20Othman%20S.;%20Jamaluddin%20S.Z.;%20Peramalah%20D.;%20Ali%20Z.M.;%20Bulgiba%20A.
https://update.library.uitm.edu.my./Record/Yunus%20R.M.;%20Hairi%20N.N.;%20Yuen%20C.W.;%20Hairi%20F.;%20Othman%20S.;%20Jamaluddin%20S.Z.;%20Peramalah%20D.;%20Ali%20Z.M.;%20Bulgiba%20A.