1. Report of the Surgeon General, 1989, Reducing the health consequences of smoking, U.S. Public Health Service, Rockville, MD
2. L, A G, Ries, B, A, Miller, B, F, Hankey, C, L, Kosary, A, Harras, B, K, Edwards, 1994, SEER cancer statistics review, 1973–1991: tables and graphs, National Cancer Institute, Bethesda, MD
3. Comparisons of black and white smoking-attributable mortality, morbidity, and economic costs in the District of Columbia;Rivo;J Nat Med Assoc,1989
4. National Center for Health Statistics, 1996, Health United States 1995, U.S. Public Health Service, Hyattsville, MD