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Cumulative Risk of Bovine Mastitis Treatments in Denmark, Finland, Norway and Sweden
[摘要]
[发布日期] 2004-12-31 [发布机构] 
[效力级别]  [学科分类] 
[关键词] culling;cumulative incidence risk;dairy herds;Nordic countries;mastitis treatment;Data recording [时效性] 
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