3WHO. Women and tobacco. World Health Organization, Geneva,1992.22-23.
4The Global Youth Tobacco Survey Collaborative Group. Tobacco use among youth: a cross country comparison. Tob Control, 2002, 11:252-270.
5Office on Smoking and Health, CDC. Selected cigarette smoking initiation a quitting behaviours among high school students -United States, 1997.MMWR,1998,47:229-233.
6Crump C, Packer L, Gfroerer J. Incidence of initiation of cigarette smoking - United States, 1965-1996. MMWR, 1998, 47: 837-840.
7Jha P,Novotny TE,Feachem R. The role of governments in global tobacco control. In: Abedian I,van der Merwe R,Wilkins N,et al,eds. The economics of tobacco control. Towards an Optimal Policy Mix. 1st ed. Applied Fiscal Research Center, University of Cape Town, 1998.41-43.
8WHO. Tobacco or health: a global status report. Geneva: World Health Organization, 1997.
9The American cancer society Inc. Tobacco control country profiles,2000.
