Polish Journal of Veterinary Sciences
Polish Journal of Veterinary Sciences > 2009 > 12 > 2 > 175-181
Polish Journal of Veterinary Sciences > 2010 > 13 > 1 > 69-73
Polish Journal of Veterinary Sciences > 2009 > 12 > 2 > 175-181
Polish Journal of Veterinary Sciences > 2010 > 13 > 1 > 69-73