Maitham, A., and S. L. A. Al-Shammari. “Effect Of Sewage Wastes On Chemical Properties Of Soil”. Al-Furat Journal of Innovations in Agricultural Sciences, vol. 1, no. 1, Jan. 2021, pp. 35-45, https://journals.atu.edu.iq/index.php/afjias/article/view/66.