Umor, M. R., A. Hussin, and N. Muda. 2020. “The Physical Properties and Geochemical of Clay from the Bestari Jaya, Kuala Selangor, Selangor, Malaysia for Potential Usage”. European Journal of Engineering and Technology Research 5 (10), 1231-36. https://doi.org/10.24018/ejers.2020.5.10.2182.