Report on a survey to determine the status of smallpox and levels of smallpox immunity
Hiriart, Juan José & Silveira, Claudio Marcos da. (1972). Report on a survey to determine the status of smallpox and levels of smallpox immunity. Geneva, Switzerland : World Health Organization. http://www.who.int/iris/handle/10665/67498
Description"Evaluation of the situation was undertaken by Dr Juan José Hiriart, Chief of the Smallpox Eradication Programme, Argentina, and Dr Claudio Marcos da Silveira, WHO consultant."
Gov't Doc #WHO/SE/72.37
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