1. The Maternity Hospital In-patient Enquiry;Ashley,1980
2. How can we improve perinatal surveillance?;Barron;British Journal of Obstetrics and Gynaecology,1986
3. DRGs are coming;Benson;British Journal of Healthcare Computing,1990
4. Geographic variation in infant mortality in relation to birthweight;Botting,1990
5. Perinatal Mortality;Butler,1963