中国荷斯坦犊牛和育成牛生长发育规律的研究

于志，高艳霞，曹玉凤，李秋凤，李建国

Study on Growth and Development Pattern of Chinese Holstein Calf and Heifer

YU Zhi，GAO Yan-xia，CAO Yu-feng，LI Qiu-feng，LI Jian-guo

中国畜牧兽医 . 2014, (6): 121 -125 .