Singkul, N., and V. Montrivade. “ Uthaithani and Nakorn Sawan Provinces”. Journal of Anthropology, Sirindhorn Anthropology Centre (JASAC), vol. 4, no. 1, June 2021, pp. 43-81, https://so06.tci-thaijo.org/index.php/jasac/article/view/239848.