Effect of Certain Petroleum Products on the Shear Strength of Clayey Soils. J. eng. sustain. dev. [انترنت]. 1 مارس، 2005 [وثق 17 مايو، 2024];9(1):33-44. موجود في: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1842