1. 1World Health Organisation . Preventing Maternal Deaths . Geneva: World Health Organisation, 1989 : 107 -136 .
2. 2World Health Organisation . Maternal Mortality: A Global Factbook . Geneva: World Health Organisation, 1991 : 3 -16 .
3. 3National maternal mortality study: findings and conclusions . Cairo: Ministry of Health in Egypt: Child Survival Project, 1994 : 20 -22 .