| Tudge, C., 1991. Time to save the rhinoceros. New Scientist 131 (1788), 1991 September 28: 30-35, figs. 1-3
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| Tudge, C., 1991. Can we end rhino poaching?. New Scientist 132 (1789), 1991 October 5: 34-39, figs. 1-7
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| Tudge, C., 1991. Last animals at the zoo: how mass extinction can be stopped . London, Hutchinson Radius, pp. 1-266
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