TY - Front. Agric. China A1 - JIA Wenbin, LI Qiufeng, GAO Yanxia, LI Jianguo, CAO Yufeng T1 - Response of lactating cows to supplemental rumen protected methionine and Niacin Y1 - 2008-03-05 JF - Frontiers of Agriculture in China JO - Front. Agric. China SP - 121 EP - 124 VL - 2 IS - 1 UR - https://academic.hep.com.cn/fag N1 - 10.1007/s11703-008-0021-7 ER -