Hameed Majeed, Adel. “Effect of Certain Petroleum Products on the Shear Strength of Clayey Soils”. Journal of Engineering and Sustainable Development 9, no. 1 (March 1, 2005): 33–44. Accessed February 10, 2025. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1842.