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Polish Journal of Veterinary Sciences > 2009 > 12 > 2 > 237-242
Polish Journal of Natural Sciences > 2009 > 24 > 4 > 198-206
Polish Journal of Veterinary Sciences > 2009 > 12 > 2 > 237-242
Polish Journal of Natural Sciences > 2009 > 24 > 4 > 198-206