Shafiqu, Qassun Sa'ad Al-Deen Mohammed, and Murtadha A. Abdulrassol. 2017. “Database of Dynamic Soil Properties for Most Iraq Soils”. American Scientific Research Journal for Engineering, Technology, and Sciences 37 (1): 230-54. https://www.asrjetsjournal.org/American_Scientific_Journal/article/view/3455.