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Ryder O,. (1983). The quagga is gone but its genes may survive. Zoonooz San Diego Zoo, 16.
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Lang Em,. (1983). Die Somaliwildesel, Equus asinus somalicus, im Basler Zoo. Zool Garten NF, 53, 73–80.
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Hoffmann R,. (1983). Social organization patterns of several Feral horse and Feral ass populations in Central Australia. Z Säugetierk, 48, 124–126.
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Becker C,. (1983). Grevy's zebra of Smburu Keya: Mother-infant behavior. Master's thesis, , .
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Java Rl,. (1983). Census of wild Ass. Tigerpaper, 10, 23.
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Shaki Sp,. (1983). About the indian Wild ass. Tigerpaper, 10, 13–16.
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Berger J,. (1983). Ecology and catastrophic mortality in wild horses: Implantations for interpreting fossil assemblages. Science 220, , 1403–1404.
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Wolfe, J. M. (1983). Hidden visual processes. Sci Am, 248(2), 94–103.
Abstract: Isoluminant stimulus is an image whose edges are defined only by a change in color, not by change in brightness. The stimulus here is imperfect: the blue parts and the green parts of the image are only as nearly equal in brightness as they can be on the printed page. Moreover, the change in brightness beyond the edge of the page is apparent, and so is the fact that the reader is holding the magazine at reading distance. When such cues are removed under laboratory conditions, subjects faced with an isoluminant stimulus prove unable to bring its edges into focus. This deficiency contributes to making a familiar face hard to recognize. The experiment indicates that the brain process underlying visual accommodation (the focusing of the eyes) cannot “see” color; it is a hidden process distinct from the processes that lead to perception. The image shows Groucho Marx as he appeared in the motion picture Horse Feathers.
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Zentall, S. S., & Zentall, T. R. (1983). Optimal stimulation: a model of disordered activity and performance in normal and deviant children. Psychol Bull, 94(3), 446–471.
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Kaseda Y,. (1983). Seasonal variations in heart rate and body temperature of Misaki horses. Proc Vth Wid Conf Anim Prod, 2, 765–766.
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