H. A. El-Nakhal and A. S. Alaug, “Nomenclature Review of the Rock Units in the StratigraphicLexicon of Yemen”, Iran J Earth Sci, vol. 5, no. 1, pp. 82–99, Sep. 2013, Accessed: May 22, 2026. [Online]. Available: https://oiccpress.com/ijes/article/view/5741