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Yerizam, Muhammad and Simanjuntak, Erwan Abjatar and Hasan, Abu (2021) Analysis Of Diesel Fuel, Biodiesel (B20 & B30) Utilizing In Excavator 313D (3054C Engine) To Greenhouse Gas At PT. Bukit Asam. INTERNATIONAL JOURNAL OF SCIENTIFIC & TECHNOLOGY RESEARCH (IJSTR), 10 (8). pp. 24-27. ISSN 2277-8616