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YALDEN DW et al,. (1986). Catalogue of the mammals of Ethiopia 6; II. order Perissodactyla; A. Family Equidae Monitore Zool italiano Suppl, 21, 35–41.
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McNaughton, S. J., & Georgiadis, N. J. (1986). Ecology of African Grazing and Browsing Mammals. Annual Review of Ecology and Systematics, 17, 39–66.
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Biederman, G. B., Robertson, H. A., & Vanayan, M. (1986). Observational learning of two visual discriminations by pigeons: a within-subjects design. J Exp Anal Behav, 46(1), 45–49.
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Schusdziarra, H., Schusdziarra, V. (1986). Reitergespräche – Der Weg zum unabhängigen Sitz.
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Eisenmann V,. (1986). Comparative osteology of modern and fossil horses, half-asses and asses. (pp. 67–116).
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Crans, W. J., McNelly, J., Schulze, T. L., & Main, A. (1986). Isolation of eastern equine encephalitis virus from Aedes sollicitans during an epizootic in southern New Jersey. J Am Mosq Control Assoc, 2(1), 68–72.
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Urcuioli, P. J., & Zentall, T. R. (1986). Retrospective coding in pigeons' delayed matching-to-sample. J Exp Psychol Anim Behav Process, 12(1), 69–77.
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Kortlandt A. (1986). The use of tools by wild-living chimpanzees and earliest hominids. J. Hum. Evol.,, 15, 77.
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Heffner, R. S., & Heffner, H. E. (1986). Localization of tones by horses: use of binaural cues and the role of the superior olivary complex. Behav Neurosci, 100(1), 93–103.
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Heird, J. C., Lokey, C. E., & Cogan, D. C. (1986). Repeatability and comparison of two maze tests to measure learning ability in horses. Appl. Anim. Behav. Sci., 16(2), 103–119.
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