Mashiatullah, A., T. Javed, M. Z. Chaudhary, M. Fazil, and R. M. Qureshi. “STABLE CARBON ISOTOPE RATIO (δ13C) OF SHALLOW MARINE BOTTOM SEDIMENT AS EVIDENCE OF POLLUTION IN MANORA CHANNEL, KARACHI, PAKISTAN”. The Nucleus, vol. 47, no. 3, Aug. 2010, pp. 233-8, http://202.83.167.189/index.php/Nucleus/article/view/888.