Clinical signs and economic losses caused by porcine reproductive and respiratory syndrome virus in a large breeding farm

Author: Pejsak Z.   Stadejek T.   Markowska-Daniel I.  

Publisher: Elsevier

ISSN: 0378-1135

Source: Veterinary Microbiology, Vol.55, Iss.1, 1997-04, pp. : 317-322

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