作者: C. Meyer , A. Joachim , A. Daugschies
DOI: 10.1016/S0304-4017(99)00027-8
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摘要: … Mixed fecal samples of 264 litters from five piglet production … piglet rearing farms, a conventional large-scale rearing unit … three times during the 6–7 week rearing period. In both units …