MUSTAFA, W. S., NAJMADDIN, D. Y., HASSAN, H. J. A. and ARBILI, M. M. (2019) “EFFECT THE SHAPE OF GRAVEL ON IMPROVING CBR AND COMPACTION BEHAVIOUR OF CLAYEY SOIL”, Journal of Duhok University, 21(2), pp. 154-164. doi: 10.26682/sjuod.2018.21.2.12.