%0 Journal Article %T Conventional and extended intramamary therapy pf persistent subclinical mastitis using nafcillin-penicillin-dihydrostreptomyavin in lactating dairy cows %A R. Kasravi %A M. Bolourchi %A Farzaneh, Nima %A Seifi, Hesam A %A A. Barin %A P. Hovareshti %A F. Gharagozlou %J Iranian Journal of Veterinary Research %@ 1728-1997 %D 2011