Geophysical and Geotechnical Evaluation of Tanjero Sandstone Layers at Dokan Area Using Ultrasonic Wave Method. Iraqi Journal of Science [Internet]. 2021 Jul. 31 [cited 2024 Apr. 27];(7):2262-71. Available from: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/2889