1. U.S. Department of Health and Human Services, Reducing the Health Consequences of Smoking: 25 Years of Progress,1989
2. Trends in cigarette smoking in the United States: The changing influence of gender and race;Fiore;JAMA,1989
3. Trends in cigarette smoking in the United States: Educational differences are increasing;Pierce;JAMA,1989
4. Population estimates and projections;U.S. Department of Commerce, Bureau of the Census,1974
5. United States population estimates, by age, sex, and race: 1980 to 1987;U.S. Department of Commerce, Bureau of the Census,1988