1. WHO revised 1990 estimates of maternal mortality: a new approach by WHO and UNICEF,1996
2. Healthier mothers and babies;MMWR Morb Mortal Wkly Rep,1999
3. Differences in maternal mortality among black and white women: United States, 1990;MMWR Morb Mortal Wkly Rep,1996
4. Healthy people 2010: with understanding and improving health and objectives for improving health,2000
5. Pregnancy-related mortality: Georgia, 1990-1992;MMWR Morb Mortal Wkly Rep,1995