Al-khafaji, B., and B. l-Khafaji. “ Basim Y. Al-Khafaji Istribution Of Some Havey Metals In The Euphrates River Ecosystem Near Al- Nassiriya City Center South Iraq .”. University of Thi-Qar Journal of Science, Vol. 2, no. 2, May 2019, pp. 11-24, https://www.jsci.utq.edu.iq/index.php/main/article/view/331.