Jose Valentin Cardenas-Medina, Juan Carlos Ku-Vera and Juan Gabriel Magana-Monforte
Journal of Animal and Veterinary Advances 9 ( 2 ): 421 - 428 , 2010
Jose Valentin Cardenas-Medina, Juan Carlos Ku-Vera and Juan Gabriel Magana-Monforte
Journal of Animal and Veterinary Advances 9 ( 3 ): 522 - 528 , 2010