“Measurement of Atmospheric Concentrations of CO, SO , NO and NOx in Urban Areas of Karachi City, Pakistan: Inorganic Ion Concentrations in Urban Karachi Atmosphere” (2010) Biological Sciences - PJSIR, 53(1), pp. 25–29. Available at: https://www.v2.pjsir.org/index.php/biological-sciences/article/view/415 (Accessed: 10 March 2026).