ประยงค์พันธ์ สมชาย. “Shear Strength and Dry Density of Compacted Sand”. Rattanakosin Journal of Science and Technology 3, no. 1 (May 11, 2021): 66–78. Accessed May 10, 2024. https://ph02.tci-thaijo.org/index.php/RJST/article/view/244749.