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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGeologists Association. Proceedings of the Geologists Association. London: Academic Press, 1859.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGeologists Association. Proceedings of the Geologists Association. Academic Press, 1859.
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