Wallace, A. R. Contributions to the Theory of Natural Selection A Series of Essays.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWallace, Alfred Russel. Contributions to the Theory of Natural Selection A Series of Essays.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWallace, Alfred Russel. Contributions to the Theory of Natural Selection A Series of Essays.
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