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. 2022;57(4C):2909-2921. Accessed May 8, 2024. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/6278