Little, M. (1976). Ecology, Energetics and Human variability. W.M.C Brown Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLittle, Michael. Ecology, Energetics and Human Variability. NULL: W.M.C Brown Company, 1976.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLittle, Michael. Ecology, Energetics and Human Variability. W.M.C Brown Company, 1976.
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