Altala, Samara J., and Thamer A. Mahdi. “Reservoir Units of Yamama Formation in Gharafoilfiled, Southern Iraq”. Iraqi Journal of Science 59, no. 2A (April 29, 2018): 697-710. Accessed November 28, 2021. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/324.