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I. G.  Horak, Boomker, J., and Flamand, J. R. B., ?Parasites of domestic and wild animals in South Africa. XXXIV. Arthropod parasites of nyalas in north-eastern KwaZulu-Natal?, Onderstepoort Journal of Veterinary Research, vol. 62, no. 3, pp. 171 - 179, 1995.

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L. J.  Fourie, Vrahimis, S., Horak, I. G., Terblanche, H. J., and Kok, O. B., ?Ecto- and endoparasites of introduced gemsbok in the Orange Free State?, South African Journal of Wildlife Research, vol. 21, no. 3, pp. 82 - 87, 1991.