O-Prasertsawat, P., Sapmadee, S., Suthutvoravut, S. and Chaturachinda, K. 1992. Relationship Between Time of Birth and Perinatal Death Ramathibodi Hospital : 1981 - 1989. Thai Journal of Obstetrics and Gynaecology. 4, 2 (Jul. 1992), 85–88.