Soisa, Tanad, Abhisit Salam, and Takayuki Manaka. “Stratigraphy and Petrochemistry of Volcanic Rocks at Suwan Prospect, Phitsanulok Province, central Thailand”. Bulletin of Earth Sciences of Thailand 12, no. 1 (November 19, 2021): 30–48. accessed September 10, 2026. https://ph01.tci-thaijo.org/index.php/bestjournal/article/view/246788.