Langsa, M. H. (2008) “POLYCYCLIC AROMATIC HYDROCARBONS (PAHs) AS BIOMARKERS FOR ASSESSING BIODEGRADATION SUSCEPTIBILITIES OF CRUDE OIL SPILLED ON SOILS”, Jurnal Natural, 7(1), pp. 33 - 38. Available at: https://jurnalnatural.unipa.ac.id/index.php/jn/article/view/73 (Accessed: 6July2026).