Polish Journal of Veterinary Sciences
Polish Journal of Veterinary Sciences > 2008 > 11 > 4 > 339-345
Polish Journal of Veterinary Sciences > 2009 > 12 > 2 > 279-284
Polish Journal of Veterinary Sciences > 2008 > 11 > 4 > 339-345
Polish Journal of Veterinary Sciences > 2009 > 12 > 2 > 279-284