1. Smoking and Health Now;Royal College of Physicians,1971
2. The Health Consequences of Smoking 1967-73. U. S,1973
3. A Study as to the Effects of the Reduction in Cigarette Smoking on Mortality and Morbidity Rates,1972
4. Report to World Health Organisation;Fletcher,1970
5. Coronary heart disease: Risk factors as guides to preventive action