Não informado. Porto Rico Review of Public Health and Tropical Medicine. Department of Health of Puerto Rico.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Porto Rico Review of Public Health and Tropical Medicine. San Juan: Department of Health of Puerto Rico.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Porto Rico Review of Public Health and Tropical Medicine. Department of Health of Puerto Rico.
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