1. House of Commons Social Services Committee. Session 1979-80, second report: perinatal and neonatal mortality,1980
2. Report. London: DHSS, 1979.
3. Maternal serum alphafetoprotein in pregnancy and the prevention of birth defect;Harris, R.;Br Med J,1980
4. The cost-benefit approach;Williams, A.;Br Med Bull,1974
5. Efficiency in the social services;Williams, A.; Anderson, R.,1975