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Schilder Mbh, B. P. (1987). Ethological investigations on a herd of Plains Zebra in a safari park: Time – budgets, reproduction and food competition. App Anim Behav Sci, 18, 45–56.
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Penzhorn Bl, L. P. (1987). Comparisons of reproductive parameters of two Cape mountain zebra populations. J Reprod Fert Suppl, 35, 661–663.
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Penzhorn Bl, G. R. (1987). Incisor wear in free – ranging Cape mountain zebras. S Afr J Wildl Res, 17, 99–102.
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Penzhorn Bl,. (1987). Descriptions of incisors of known – age Cape Mountain Zebras from the Mountain Zebra National park. Onderstepoort J vet Res, 54, 135–141.
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Olivier W,. (1987). Is it possible to bring back the quagga? Roan News, 4, 1–2.
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Mcinnis Ml, V. M. (1987). Dietary relationships among feral horses, cattle, and pronhorn in southeastern Oregon. J Range Mgmt, 40, 60–66.
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Klingel H,. (1987). Unpaarhufer, Pferde. in Grzimek B (ed): Grzimeks Enzyklopädie Säugetiere, 4, 548–592, Kindler.
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Harley Eh,. (1987). The retrieval of the quagga.
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GODFREY D et al,. (1987). Zebra stripes and tiger stripes: the special frequency distribution of the pattern compared to that of the background is significant in disply and crysis. Biol J Linnean Soc, 32, 427–433.
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Glen-Leary J,. (1987). Stud book for zebras. Farmer's weekly, .
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