Munshi, A. B., A. S. Hina, and T. H. Usmani. 2005. “Determination of the Level of PCBs in Small Fishes from Three Different Coastal Areas of Karachi, Pakistan”. Biological Sciences - PJSIR 48 (4):247-51. https://v2.pjsir.org/index.php/biological-sciences/article/view/1386.