Cooper, J. J. and Appleby, M. C. (2003) The value of environmental resources to domestic hens: a comparison of the work-rate for food and for nests as a function of time. Animal welfare, 12 (1). pp. 39-52. ISSN 0962-7286
The value of environmental resources to domestic hens: a comparison of the work-rate for food and for nests as a function of time
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