Suwanich, P. (2017) “Geological map of Phutok formation improvement explored from Potash and Rock Salt drilled holes, topography and outcrops on the Khorat Plateau”, Asia-Pacific Journal of Science and Technology, 17(1), pp. 58–70. Available at: https://so01.tci-thaijo.org/index.php/APST/article/view/82822 (Accessed: 13 May 2024).