SAMJ: South African Medical Journal On-line version ISSN 2078-5135
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COMBRINK, A et al.High prevalence of hookah smoking among secondary school students in a disadvantaged community in Johannesburg. SAMJ, S. Afr. med. j. [online]. 2010, vol.100, n.5, pp. 297-299. ISSN 2078-5135.