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Polish Journal of Veterinary Sciences > 2008 > 11 > 4 > 295-299
Medycyna Weterynaryjna > 2007 > 63 > 12 > 1561-1563
Polish Journal of Veterinary Sciences > 2008 > 11 > 4 > 295-299
Medycyna Weterynaryjna > 2007 > 63 > 12 > 1561-1563