“Determination of Elastic Moduli and Geotechnical Parameters of the Upper Soil Layer Using Ultrasonic Waves in Al- Jadiriyah Area - University of Baghdad-Iraq”, Iraqi Journal of Science, vol. 57, no. 4C, pp. 2909–2921, Jan. 2022, Accessed: Jul. 26, 2025. [Online]. Available: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/6278