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中国医科大学妇产科学英文课件 dystocia（一）。
中国医科大学妇产科学英文课件 dystocia（二）。
Prevalence, Risk Factors and Consequent Effect of Dystocia in Holstein Dairy Cows in Iran
Birth Weight Dystocia Holstein
2016/5/9
The objective of this research was to determine the prevalence, risk factors and consequent effect of dystocia on lactation performance in Holstein dairy cows in Iran. The data set consisted of 55,577...