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J. Zhang,
D. X. Sun,
J. E. Womack,
Y. C. Wang,
Y. Yu,
R. Liu
and Y. Zhang
(2009).
Polymorphism identification, RH mapping and association of placental lactogen gene with milk production traits of dairy cows. animal,
3
,
pp 1-5
doi:10.1017/S1751731108003054