1. Puffing frequency and nicotine intake in cigarette smokers;Ashton;British Medical Journal,1970
2. Tobacco use in California 1990–1991;Burns,1992
3. Group guidance for academically undermotivated children;Campbell;Elementary School Guidance and Counseling,1991
4. World No-Tobacco Day;Centers for Disease Control [CDC];Morbidity & Mortality Weekly Reports,1992
5. Cigarette smoking among adults—United States;Centers for Disease Control [CDC];Morbidity & Mortality Weekly Reports,1992