Relationship between herd size and annual prevalence of and primary antimicrobial treatments for common diseases on dairy operations in the United States
| Autor: | Hill, Ashley E., Green, Alice L., Wagner, Bruce A., Dargatz, David A. |
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| Zdroj: | In Preventive Veterinary Medicine 2009 88(4):264-277 |
| Databáze: | ScienceDirect |
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