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    R. Clubb, M. Rowcliffe, P. Lee, K. U. Mar, C. Moss, G. J. Mason, Compromised Survivorship in Zoo Elephants, Science, 2008, 322, 5908, 1649

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    Michael Hutchins, Steven D. Thompson, Zoo and aquarium research: priority setting for the coming decades, Zoo Biology, 2008, 27, 6
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