Não informado. (1950). Bulletin of the British Museum Natural History. British Museum of Natural History.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the British Museum Natural History. London: British Museum of Natural History, 1950.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the British Museum Natural History. British Museum of Natural History, 1950.
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