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Boyd, L.,. (1988). The behavior of Przewalski's horses. Ph.D. thesis, , Cornell University. |
Jenks, S. M. (1988). Behavioral regulation of social organization and mating in a captive wolf pack. Ph.D. thesis, Univ. Conn. Dept. Biobehavioral Sci, . |
Boyd L. (1988). The behaviour of Przewalski’s horses. Ph.D. thesis, Cornell University, Ithaca, NY. |