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Bednarz, J. C. (1988). Cooperative Hunting Harris' Hawks (Parabuteo unicinctus). Science, 239(4847), 1525–1527.
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Berger, J.,. (1988). Social systems, resources, and phylogenetic inertia: an experimental test and its limitations. In C. N. Slobochikoff (Ed.), Ecology of Social Behavior (pp. 157–186). San Diego: Academic Press.
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Berger, J., & Cunningham, C. (1988). Size-Related Effects on Search Times in North American Grassland Female Ungulates. Ecology, 69(1), 177–183.
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Black, J. M. (1988). Preflight Signalling in Swans: A Mechanism for Group Cohesion and Flock Formation. Ethology, 79(2), 143–157.
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Boyd L. (1988). The behaviour of Przewalskiís horses. Ph.D. thesis, Cornell University, Ithaca, NY.
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Boyd, L.,. (1988). The behavior of Przewalski's horses. Ph.D. thesis, , Cornell University.
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Boyd, L. E. (1988). Ontogeny of behavior in Przewalski horses. Appl. Anim. Behav. Sci., 21(1-2), 41–69.
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Boyd, L. E., Carbonaro, D. A., & Houpt, K. A. (1988). The 24-hour time budget of Przewalski horses. Appl. Anim. Behav. Sci., 21(1-2), 5–17.
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Brennan, J., & Anderson, J. (1988). Varying responses to feeding competition in a group of rhesus monkeys (Macaca mulatta). Primates, 29(3), 353–360.
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Byrne, R., & Whiten, A. (1988). Machiavellian Intelligence. Oxford: Oxford Univ Press.
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