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Author Title Year Publication Serial Volume Pages
Khalil, A.M.; Murakami, N.; Kaseda, Y. Relationship between plasma testosterone concentrations and age, breeding season and harem size in Misaki feral horses 1998 The Journal of veterinary medical science / the Japanese Society of Veterinary Science 137 60 643-645
Albentosa, M.J.; Kjaer, J.B.; Nicol, C.J. Strain and age differences in behaviour, fear response and pecking tendency in laying hens 2003 British poultry science 80 44 333-344
Houpt, K.A. Animal behavior as a subject for veterinary students 1976 The Cornell veterinarian 61 66 73-81