H. Hussein, S., O. K.M. Sajid, and T. A. Aghwan. “Gypcrete in the Upper Part of Fat`ha Formation at Mahalabia Area / NW Iraq”. Iraqi National Journal of Earth Science (INJES), vol. 8, no. 2, Dec. 2008, pp. 50-63, doi:10.33899/earth.2008.5482.