Al-Eqabi , Haqi H. Abbood, and Ali M. Hassan Al-Gharbawee. 2019. “Effect of Coarse Aggregate Columns on Angle of Friction in Fine Sandy Soil”. Wasit Journal of Engineering Sciences 7 (2): 55-61. https://ejuow.uowasit.edu.iq/index.php/ejuow/article/view/146.