Useful Sources of Information
- Abramson J. H. (1990) Survey Methods in Community Medicine 4th edn, Churchill Livingstone, Edinburgh.
- Burt B. and Eklund S. (1992) Dentistry, Dental Practice and the Community, 4th edn, W B Saunders, London.
- Cochrane A. (1972) Effectiveness and Efficiency. Random reflections on health services, Nuffield Provincial Hospitals Trust, London.
- Drummond M. F., Stoddart G. L. and Torrance G. W. (1987) Methods for the Economic Evaluation of Health Care Programmes, Oxford University Press, Oxford.
- Dryland Vig K. W. L. and Vig P. S. (1991) Clinical Research as the Basis of Clinical Practice, Volume 25, Craniofacial Growth Series, University of Michigan, Ann Arbor, Michigan.
- Fletcher R. H., Fletcher S. F. and Wagner E. H. (1988) Clinical Epidemiology, the Essentials, 2nd edn, Williams and Wilkins, Baltimore.
- St Leger A., Schnieden H. and Walsworth-Bell J. P. (1992) Evaluating Health Services Effectiveness, Open University Press, Buckingham.