Al-Massaedh, “Ayat Allah”. “Assessment of Heavy Metal Contamination in Roadside Soils Along Irbid-Amman Highway, Jordan by ICP-OES”. Jordan Journal of Chemistry (JJC) 15, no. 1 (February 16, 2020): 1-12. Accessed November 27, 2020. http://jjc.yu.edu.jo/index.php/jjc/article/view/171.