Bahar Kazem, H. “ Seasonal Variatins of Polychlorinted Biphenyls Compounds in Water of Tigris River , Maysan Province / Iraq”. (Humanities, Social and Applied Sciences) Misan Journal of Academic Studies , Vol. 24, no. 53, Apr. 2025, pp. 158-70, https://misan-jas.com/index.php/ojs/article/view/861.