Parez Najat Agha, Balan Tariq Omer. “The Variability Levels of Elements in the Waste Water of Capakcur River: An Analytical Study”. International Journal of Modern Agriculture, vol. 10, no. 2, Apr. 2021, pp. 2600 -14, http://modern-journals.com/index.php/ijma/article/view/1066.