“STUDY ON WASTE wATERS OF METAL FINISHING INDUSTRIES AROUND LAHORE METROPOLITAN AREA”, Pakistan Journal of Scientific & Industrial Research, vol. 45, no. 5, pp. 312–317, Oct. 2002, Accessed: Mar. 22, 2026. [Online]. Available: https://biostaging.pjsir.org/index.php/biological-sciences/article/view/1825