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Citations
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Clabby, J. (1976). The Natural History of the Horse. New York: Taplinger Publishing Company.
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Schaller, G. B.:. (1976). The Serengeti Lion: A Study of Predator-Prey Relations (Wildlife Behavior and Ecology series). Chicago: University Of Chicago Press.
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Humphrey, N. K. (1976). The social function of intellect. In P. P. G. Bateson, & R. A. Hinde (Eds.), Growing Points in Ethology (pp. 303–317). Cambridge: Cambridge University Press.
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