Não informado. (2018). Report. Ohio State University, Institute of Polar Studies.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Report. Columbus, Ohio: Ohio State University, Institute of Polar Studies, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Report. Ohio State University, Institute of Polar Studies, 2018.
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