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FRERICHS WM et al,. (1973). Equine Piroplasmosis: Therapeutic trials of imidocarb dihydrochloride in horses and donkeys. Vet Rec, 93, 73–75.
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Gogan Pjp,. (1973). Some aspects of nutrient utilization by Burchell's Zebra in the Serengeti-Mara region.
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Klingel H,. (1973). Am Hitzepol der Erde zu Fuß auf Wildesel. Das Tier, 8, 10–15 u. 56.
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Marrable Aw,. (1973). The foal in the womb. Myriad Book, 7.
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Rashek Va,. (1973). Reproduction of the wild ass and its behavior during rutting time on the Barsa – Kelmes Island. Bjul Mosk Obsc Ispy Priroda Ot Biol, 78.
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Welsh Da,. (1973). The life of Sable Island's wild horses. Nature Canada, 2, 7–14.
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Ödberg Fo,. (1973). An interpretation of pawing by the horse, displacement activity and original functions. Säugetierk Mitt, 21, 1–12.
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Ödberg Fo,. (1973). L'éthologie: Son passé et son development actuel. Zoo, 38, 208–213.
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Solomatin Ao,. (1973). Kulan. Moskau.
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Anderson, G. D., & Herlocker, D. J. (1973). Soil factors affecting the distribution of the vegetation types and their utilization by wild animals in Ngorongoro Crater, Tanzania. J Ecol, 61, 627–651.
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