Sasiwongsaroj, K., C. Sethaput, P. Vapattanawong, and K. Ford. “Child Mortality Inequality Between Thais and Hilltribes in Thailand: Study from Population and Housing Census 2000”. Journal of Population and Social Studies [JPSS], vol. 16, no. 2, Jan. 2008, pp. 143-64, https://so03.tci-thaijo.org/index.php/jpss/article/view/84574.