求助2012年英文文献一篇

john7812x

Survey of nine abortifacient infectious agents in aborted bovine fetuses from dairy farms in Beijing, China, by PCR.9 p* q, N# p0 i2 \4 \' \8 l
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Acta Vet Hung. 2012 Mar;60(1):83-92.
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: d7 E' L) c7 I8 OYang N, Cui X, Qian W, Yu S, Liu Q.. j& v- E: N8 f$ {  `; e( o8 ?

2 l9 R0 h3 a6 Z! [1 g( ]http://www.ncbi.nlm.nih.gov/pubmed/22366134. ?/ Z9 U& C3 _, H" C

wrh-alon

求When Are Two Heads Better than One and Why?

juxingda

希望有帮助