สุวานิช ป. “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, vol. 41, no. 3, Sept. 2013, pp. 756-69, https://ph01.tci-thaijo.org/index.php/KKUSciJ/article/view/249176.