Khorshid, Salman, and Rassoull Salman. 2023. “Using Ultrasonic Technique to Measure Some Petrophysical Properties of Yamama Formation at Ratawi-7 Oil Well Core Samples, Southern Iraq”. Iraqi Journal of Science 55 (2B): 768-79. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/11800.