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https://animorepository.dlsu.edu.ph/etd_bachelors/17194/ "A comparative study on the trend in the prices of petroleum products d" by Leslie Bryan T. Chua,... By Leslie Bryan T. Chua, Alejandro E. Lopez, Josefine W. Uygeehing, et al., Published on 01/01/01 comparative study on the petroleum products leslie bryan trend