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Irawan, A., Bindar, Y., Kurniawan, T., Alwan, H., Rosid, R. and Fauziah, N.A. 2021. Bayah Natural Zeolites to Upgrade the Quality of Bio Crude Oil from Empty Fruit Bunch Pyrolysis. Journal of Engineering and Technological Sciences. 53, 3 (Jun. 2021), 210308. DOI:https://doi.org/10.5614/j.eng.technol.sci.2021.53.3.8.