Martin, E.B. 1984.They’re killing off the rhino.National Geographic 165 (3): 404-422, figs. 1-16.
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Martin, E.B. 1984.North Yemen and the rhino horn trade today.Swara 7 (2): 28-33, figs. 1-4.
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Martin, E.B. 1983.Rhino exploitation: the trade in rhino products in India, Indonesia, Malaysia, Burma, Japan & South Korea.Hong Kong, WWF Hong Kong.pp. 1-122.