Macdougall, J. D. (2013). Frozen earth: The once and future story of ice ages. University of California Press.
Citace podle Chicago (17th ed.)Macdougall, J. D. Frozen Earth: The Once and Future Story of Ice Ages. Berkeley: University of California Press, 2013.
Citace podle MLA (9th ed.)Macdougall, J. D. Frozen Earth: The Once and Future Story of Ice Ages. University of California Press, 2013.
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