Saad Jasim, H., N. Soleman, and M. Al jbouri. “A Study of Essential Components of Three Types of Bituminous Materials in Mishraq Sulfur Mine”. Journal of Education and Science (JES), vol. 29, no. 3, Sept. 2020, pp. 119-2, doi:10.33899/edusj.2020.126679.1050.