KHALID, A. H., and A. S. AL-QASSAB. “ASSESSMENT OF GYPSUM AND LIMESTONE ROCKS FROM FAT’HA FORMATION (M. MIOCENE) FOR MAKING WALLBOARD IN THE MAKHMUR AREA – NORTHERN IRAQ”. Journal of Duhok University, Vol. 24, no. 1, May 2021, pp. 79-87, doi:10.26682/sjuod.2021.24.1.10.