Al-Shayeb, S.M. “Metals Content in Soils of the Industrial Cities and the Industrial Workshops Area in Riyadh, Saudi-Arabia ”. Asian Journal of Chemistry 14, no. 3 (March 30, 2010): 1161–1177. Accessed August 26, 2024. https://asianpubs.org/index.php/ajchem/article/view/22375.