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pro vyhledávání: '"M. C. Pelley"'
Publikováno v:
Canadian Journal of Animal Science. 75:631-632
Twenty-four 9-mo-old Hereford steers were randomly divided into three groups of eight to determine if the steers would react to enrichment objects, and if one object would be used more than the others. The experiment design was a 3 × 3 Latin square