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Johnston, B. 1990. Grand total: 50 Javan rhino. REF Journal 4: 24-25, fig. 1.
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Johnston, B. 1990. Black rhinos, can we save them. Zooculturist 5 (4): 11-12.
Johnston, B. 1989. The woolly rhino. Zooculturist 2 (2): 4-5, 14.






