Ecological risk assessment of Polychlorinated Biphenyls (PCB) in the sediment around Langkawi Island, Malaysia. RJBAS [انترنت]. 31 ديسمبر، 2025 [وثق 2 أكتوبر، 2026];4(2):14-9. موجود في: https://ojs.abhath-ye.com/index.php/OJSRJBAS/article/view/892