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The effects of lighting programmes with twelve hours of darkness per day provided in one, six or twelve hour intervals on the productivity and health of broiler chickens |
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| Authors: | Classen H L Annett C B Schwean-Lardner K V Gonda R Derow D |
| Affiliation: | University of Saskatchewan, Saskatoon, SK, S7N 5A8, Canada. |
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| 本文献已被 PubMed 等数据库收录！ | |