More suggestions and sources
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Davis, Lloyd Spencer. The plight of the
penguin. Dunedin: Longacre, 2001.
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Davis, Lloyd S., and John T. Darby, eds.
Penguin biology. San Diego: Academic
Press, 1990.
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Davis, L. Spencer, and Martin Renner.
Penguins. London: Poyser, 2003.
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Williams, Tony D. The penguins. Oxford:
Oxford University Press, 1995.
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