Leren Xu, Deyuan Ou and Denghui Gao
Journal of Animal and Veterinary Advances 2 ( 1 ): 38 - 43 , 2003
Leren Xu, Xiaozhen Yang, Denghui Gao and Ping Jiang
Journal of Animal and Veterinary Advances 2 ( 3 ): 191 - 195 , 2003