Faycal, Kerboua. “The Use of Wastewater in the Irrigation of Agricultural Soils and Its Contamination Effect by Trace Elements: A Review”. European Scientific Journal, ESJ 14, no. 18 (June 30, 2018): 273. Accessed May 1, 2024. https://eujournal.org/index.php/esj/article/view/10972.