A. Al-Hasson and Yasser H. Kaddo, M., مها, D. Nader, A. and عامر (2025) “A Detail Study of the Genus Vallatisporites as a Lower Carboniferous Stratigraphic and Paleogeographic Indicator”, Iraqi National Journal of Earth Science (INJES), 7(2), pp. 73–96. doi: 10.33899/earth.2007.39273.