Andrews, E. (1935). New numbers: How acceptance of a duodecimal base would simplify mathematics. Harcourt, Brace and Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAndrews, Emerson. New Numbers: How Acceptance of a Duodecimal Base Would Simplify Mathematics. New York,N.Y: Harcourt, Brace and Company, 1935.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAndrews, Emerson. New Numbers: How Acceptance of a Duodecimal Base Would Simplify Mathematics. Harcourt, Brace and Company, 1935.
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