Não informado. Problems of Infectious and Parasitic Diseases. Medical Academy.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Problems of Infectious and Parasitic Diseases. Sofia: Medical Academy.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Problems of Infectious and Parasitic Diseases. Medical Academy.
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