Hameed Majeed, A. (2005) “Effect of Certain Petroleum Products on the Shear Strength of Clayey Soils”, Journal of Engineering and Sustainable Development, 9(1), pp. 33–44. Available at: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1842 (Accessed: 4 June 2026).