Vaccination against influenza in Poland, 1953-56

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Przesmycki, Felix, Sawicki, Leon & Dobrowolska, Halina. (1959). Vaccination against influenza in Poland, 1953-56. Bulletin of the World Health Organization, 20 (2-3), 333 - 353. World Health Organization. https://iris.who.int/handle/10665/265335