USE OF MILK PROGESTERONE RIA TO IMPROVE FERTILITY IN DAIRY COWS
Cai Zhenghua \ Lu Yanping\ \ Cheng Jinhua (Institute of Animal Science, CAAS, Beijing 100094) Xian Baihua\ \ Fang Yanjun (Beijing Liangzhong Dairy Farm, Beijing 102209) Wang Yunheng\ \ Zheng Minguo\ Zhang Yun\ \ Sun Yongfang (Milch Cow Company
J4 . 1998, (03): 179 -0 .  DOI: 10.11869/hnxb.1998.03.0179

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