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Wardana, D., Eddiyanto, E., Nurfajriani, N., & Gea, S. (2023). The effect of methanol flow rate and repeated use on amberlyst catalyst characteristics in palm fatty acid distillate (PFAD) esterification reaction. Jurnal Pendidikan Kimia, 15(2), 155–162. https://doi.org/10.24114/jpkim.v15i2.43668