Thangwijitra, S., Sripramodya, C. and Kanchanawat, S. 2012. Risk Factors of Birth Asphyxia in Pregnancy 37 Complete Weeks and Over by Apgar Score Less Than 7 at 5 Minutes. Thai Journal of Obstetrics and Gynaecology. 18, 2 (May 2012), 54–62.