Não informado. (1973). Bulletin of the Pan American Health Organization. Pan American Health Organization.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the Pan American Health Organization. Washington: Pan American Health Organization, 1973.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the Pan American Health Organization. Pan American Health Organization, 1973.
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