I. Hassan and B. Elhassan, “Heavy Metals Pollution and Trend in the River Nile System”, ASRJETS-Journal, vol. 21, no. 1, pp. 69–76, Jun. 2016, Accessed: Sep. 17, 2025. [Online]. Available: https://www.asrjetsjournal.org/American_Scientific_Journal/article/view/1799