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The Veterinary Journal > 2003 > 165 > 2 > 136-142
International Journal for Parasitology > 1997 > 27 > 9 > 1061-1064
The Veterinary Journal > 2003 > 165 > 2 > 136-142
International Journal for Parasitology > 1997 > 27 > 9 > 1061-1064