Nawarat Suwannapong และผู้แต่งคนอื่นๆ. (1987) A multilevel analysis of determinants of infant mortality in rural Northeastern Thailand. National Institute of Development Administration:ม.ป.ท.Nawarat Suwannapong และผู้แต่งคนอื่นๆ. 1987. A multilevel analysis of determinants of infant mortality in rural Northeastern Thailand. ม.ป.ท.:National Institute of Development Administration;Nawarat Suwannapong และผู้แต่งคนอื่นๆ. A multilevel analysis of determinants of infant mortality in rural Northeastern Thailand. ม.ป.ท.:National Institute of Development Administration, 1987. Print.