Prasunnakarn, S. (2013) “Perinatal Mortality in Udonthani Provine in 1996”, Srinagarind Medical Journal, 12(2), pp. 56–63. available at: https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/13983 (accessed: 17 September 2026).