1. Preventing tobacco use among young people: A report of the Surgeon General;U.S. Department of Health and Human Services,1994
2. The health consequences of using smokeless tobacco: A report of the advisory committee to the Surgeon General;U.S. Department of Health and Human Services;NIH Publication no. 86-2874,1986
3. IARC Monographs on the evaluation of the carcinogenic risk of chemicals to humans: Tobacco habits other than smoking; betel-quid and areca-nut chewing; and some related nitrosamines 37;International Agency for Research on Cancer,1985
4. Snuff dipping and oral cancer among women in the southern United States;Winn;N Engl J Med,1981
5. Smokeless tobacco control: Report of a WHO study group;World Health Organization;WHO Technical Report Series 773,1988