U.S. Agency for International Development (December 2004). "Health Profile: Angola"(PDF). Archived from the original(PDF) on 2008-08-16. Retrieved 2017-12-13.
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U.S. Agency for International Development (December 2004). "Health Profile: Angola"(PDF). Archived from the original(PDF) on 2008-08-16. Retrieved 2017-12-13.