The Effect of Pre-used Oil of Cars Mixed with Salt Resistance Cement on Collapsibility of Gypseous Soil. J. eng. sustain. dev. [Internet]. 2009 Mar. 1 [cited 2024 May 20];13(1):47-5. Available from: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1528