Weekly Epidemiological Record, 2007, vol. 82, 21 [full issue]

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World Health Organization. (2007). Weekly Epidemiological Record, 2007, vol. 82, 21 [full issue]. Weekly Epidemiological Record = Relevé épidémiologique hebdomadaire, 82 (21), 181 - 196. http://www.who.int/iris/handle/10665/240947