Não informado. (1953). Proceedings of the Geological Society of London. Geological Society of London.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Proceedings of the Geological Society of London. London: Geological Society of London, 1953.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Proceedings of the Geological Society of London. Geological Society of London, 1953.
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