KHAN, Zafar Iqbal et al. Effect of Sewage Water on Accumulation of Metals in Soil and Wheat in Punjab, Pakistan. Pakistan Journal of Analytical & Environmental Chemistry, [S.l.], v. 20, n. 1, p. 60-66, june 2019. ISSN 2221-5255. Available at: <http://pjaec.pk/index.php/pjaec/article/view/377>. Date accessed: 15 dec. 2019. doi: http://dx.doi.org/10.21743/pjaec/2019.06.08.