Weekly Epidemiological Record, 2009, vol. 84, 49 [full issue]

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World Health Organization. (2009). Weekly Epidemiological Record, 2009, vol. 84, 49 [full issue]. Weekly Epidemiological Record = Relevé épidémiologique hebdomadaire, 84(49) (49), 505 - 516. http://www.who.int/iris/handle/10665/241473