1. U.S. Department of Health and Human Services. 1986 The health consequences of using smokeless tobacco N1H Publication 86 2874 Bethesda, MD
2. The impact of tobacco use and cessation on oral and dental diseases and conditions;Christen;Am J Med,1992
3. National Institutes of Health consensus statement Health implications of smokeless tobacco use;NIH Consensus Development Panel;Biomed Pharmacother,1988
4. Smokeless tobacco The health conse quences of snuff and chewing tobacco;Goolsgy;Nurse Pract,1992
5. Surgeon general warns against use of smoke less tobacco;McCann;J Am Dent Assoc,1993