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The Veterinary Journal > 2012 > 194 > 2 > 166-172
Preventive Veterinary Medicine > 1997 > 31 > 1-2 > 113-125
The Veterinary Journal > 2012 > 194 > 2 > 166-172
Preventive Veterinary Medicine > 1997 > 31 > 1-2 > 113-125