Ketwetsuriya, C., & Kanjanapayont, P. (2021). Stratigraphic Distribution of Permian Gastropods from Tak Fa Formation in Southern Part of Nakhon Sawan Province, Thailand. Bulletin of Earth Sciences of Thailand, 8(1), 88–92. retrieved from https://ph01.tci-thaijo.org/index.php/bestjournal/article/view/246727