Rookmaaker, L.C. 1999.Tracking the rhinoceros? Share your experiences.Hornbill 1999 July-September: 2.
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Rookmaaker, L.C. 1999.Rhinoceros illustrations, 2: Henderyckx.Rhino Watch 10 in SA Game & Hunt 5 (1): 29, figs. 1-2.
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Rookmaaker, L.C. 1999.Note on the third edition.In: Merz, A., Rhinos: at the brink of extinction, 3rd ed. Johannesburg, Longhorn Publishers.p. 8.
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Rookmaaker, L.C. 1999.The name of the black rhinoceros (Factfile, no 1).Rhino Watch 10 in SA Game & Hunt 5 (1): 2.
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Rookmaaker, L.C. 1999.Tracking the rhinoceros – share your experiences.Mitteilungen der Namibia Wissenschaftlichen Gesellschaft 40: 2.
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Rookmaaker, L.C. 1998.Samuel Daniell’s new species of rhinoceros found in 1801.REF Journal 12: 32-35, figs. 1-4.
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Rookmaaker, L.C. 1998.The rhinoceros library in the Waterberg.REF Journal 12: 36, fig. 1.
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Rookmaaker, L.C. 1998.Chapter 4. The Indian rhinoceros (Rhinoceros unicornis) in captivity to 1994.In: Rookmaaker, L.C., The rhinoceros in captivity: a list of 2439 rhinoceroses kept from Roman times to 1994. The Hague.pp. 33-115.
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Rookmaaker, L.C. 1998.Impressions on a survey documenting the rhinoceros in captivity.Journal of the Bartlett Society 9: 4-6.
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Rookmaaker, L.C. 1998.Chapter 5. The Javan rhinoceros (Rhinoceros sondaicus) in captivity to 1994.In: Rookmaaker, L.C., The rhinoceros in captivity: a list of 2439 rhinoceroses kept from Roman times to 1994. The Hague.pp. 117-127.
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Rookmaaker, L.C. 1998.Rhinoceros illustrations, 1: W.J. Burchell.Rhino Watch 8 in SA Game & Hunt, 4(5): 40-41, fig. 1.
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Rookmaaker, L.C. 1998.Chapter 8 (part). The northern white rhinoceros (Ceratotherium simum cottoni) in captivity to 1994.In: Rookmaaker, L.C., The rhinoceros in captivity: a list of 2439 rhinoceroses kept from Roman times to 1994. The Hague.pp. 270-274.
Rookmaaker, L.C. 1998.Northern white rhino update.Rhino Watch 8 in SA Game & Hunt, 4(5): 40.
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Rookmaaker, L.C. 1998.Chapter 6. The Sumatran rhinoceros (Dicerorhinus sumatrensis) in captivity to 1994.In: In: Rookmaaker, L.C., The rhinoceros in captivity: a list of 2439 rhinoceroses kept from Roman times to 1994. The Hague.pp. 129-153.
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Rookmaaker, L.C. 1998.The sources of Linnaeus on the rhinoceros.Svenska Linnesallskapets Arsskrift 1996/97: 61-80, figs. 1-15.
Rookmaaker, L.C. 1998.Chapter 7. The black rhinoceros (Diceros bicornis) in captivity to 1994.In: Rookmaaker, L.C., The rhinoceros in captivity: a list of 2439 rhinoceroses kept from Roman times to 1994. The Hague.pp. 155-244.
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Rookmaaker, L.C. 1998.H.R. Rookmaaker (1887-1945), pioneer of nature conservation in the Dutch East Indies.Saugetierkundliche Mitteilungen 41 (1): 3-6, figs. 1-2.
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Rookmaaker, L.C. 1998.Chapter 1. Introduction.In: Rookmaaker, L.C., The rhinoceros in captivity: a list of 2439 rhinoceroses kept from Roman times to 1994. The Hague.pp. 1-19.
Rookmaaker, L.C. 1998.Chapter 8. The white rhinoceros (Ceratotherium simum) in captivity to 1994.In: Rookmaaker, L.C., The rhinoceros in captivity: a list of 2439 rhinoceroses kept from Roman times to 1994. The Hague.pp. 244-374.
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Rookmaaker, L.C. 1998.Zoological Gardens need a central library!.Newsletter of the Bartlett Society 1998 September: 5.
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Rookmaaker, L.C. 1998.Chapter 2. Statistics on demography and reproduction.In: Rookmaaker, L.C., The rhinoceros in captivity: a list of 2439 rhinoceroses kept from Roman times to 1994. The Hague.pp. 21-25.