สุวานิช ปกรณ์. “The Studying Potassium Bromide Profile (KBr profile) of Drilledholes K-68 and K-70 in Nachueak District, Maha Sarakham Province to Prove the Overturn Bed of Rock Salt and Potash Bed in Maha Sarakham Formation by Comparative KBr Contents with a Normal Bed”. KKU Science Journal 41, no. 3 (September 30, 2013): 756–769. accessed August 26, 2026. https://ph01.tci-thaijo.org/index.php/KKUSciJ/article/view/249176.