Various. Scientific American Supplement, No. 363, December 16, 1882.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVarious. Scientific American Supplement, No. 363, December 16, 1882.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVarious. Scientific American Supplement, No. 363, December 16, 1882.
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