1. Report on confidential enquiries into maternal deaths in the United Kingdom 1988–1990;UK Health Departments,1994
2. International Classification of Diseases;World Health Organisation (WHO),1977
3. Health for All 2000;World Health Organisation (WHO),1991
4. Maternal mortality — a global factbook;AbouZahr,1991
5. Reasons for the underreporting of maternal mortality in France, as indicated by a survey of all deaths among women of childbearing age;Bouvier-Colle;Int J Epidemiol,1991