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Nurdin, S. , Misebah, F. , Yunus, R. , Mahmud, M. , Sulaiman, A.. "Conversion of Jatropha curcas Oil to Ester Biolubricant Using Solid Catalyst Derived from Saltwater Clam Shell Waste (SCSW)". World Academy of Science, Engineering and Technology, Open Science Index 93, International Journal of Chemical and Molecular Engineering, (2014), 8(9), 1033 - 1039.