1. D. Ashley, and I. Chalmers (1992 ) Trial to assess the effects of low-dose aspirin on the incidence of pre-eclampsia . InOxford Database of Perinatal Trials, () version 1. 2, disc issue 7, record number6375 .
2. A. Atallah, and I. Chalmers (1992 ) Collaborative study for the prevention of pre-eclampsia with aspirin (ECPPA) (trans) . InOxford Database of Perinatal Trials, () version 1. 2 disc issue 7, record number5398 .
3. Levels of Maternal Mortality in Developing Countries
4. Identifying Maternal Mortality through Networking: Results from Coastal Kenya