Phonseela, Nachayada, Thitiphan Assawincharoenkij, and Sirilak Lorchuenwong. “Acid Forming Potential of Black Shale in Ban Pong Basin, Northern Thailand”. Bulletin of Earth Sciences of Thailand 14, no. 2 (December 23, 2022): 166–177. accessed September 11, 2026. https://ph01.tci-thaijo.org/index.php/bestjournal/article/view/248754.