World Health Organization. (1991). The Work of WHO in the Eastern Mediterranean Region: Annual Report of the Regional Director. World Health Organization Regional Office for the Eastern Mediterranean.
Chicago-čujuhus (17. p.)World Health Organization. The Work of WHO in the Eastern Mediterranean Region: Annual Report of the Regional Director. Egypt: World Health Organization Regional Office for the Eastern Mediterranean, 1991.
MLA-čujuhus (9. p.)World Health Organization. The Work of WHO in the Eastern Mediterranean Region: Annual Report of the Regional Director. World Health Organization Regional Office for the Eastern Mediterranean, 1991.
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