Não informado. (1999). Journal of the Geological Society of London. Geological Society of London.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Geological Society of London. London: Geological Society of London, 1999.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Geological Society of London. Geological Society of London, 1999.
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