Allen, G. (1978). Life science in the twentieth century. London: Cambridge University Press.
शिकागो स्टाइल उद्धरणAllen, Garland. Life Science in the Twentieth Century. London: Cambridge University Press, 1978.
एमएलए उद्धरणAllen, Garland. Life Science in the Twentieth Century. London: Cambridge University Press, 1978.
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