Vigne, L.; Martin, E.B. 2011.The ivory dynasty: A report on the soaring demand for elephant and mammoth ivory in southern China.London, Elephant Family, The Aspinall Foundation and Columbus Zoo and Aquarium.pp. 1-20.
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Vigne, L.; Martin, E.B. 2011.Consumption of elephant and mammoth ivory increases in southern China.Pachyderm 49: 79-89.