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Study on General Lactation Curve Models and Milk Composition Change Models of Chinese Holstein Cows in the North of China
XIONG Ben-hai,YANG Liang,YANG Qin,PAN Xiao-hua,HAN Ying-dong,PANG Zhi-hong
畜牧兽医学报 . 2014, (12): 1939 -1948 .  DOI: 10.11843/j.issn.0366-6964.2014.12.005