By Githiori J.B.   Kooyman F.N.J.   Kruitwagen C.   Ploeger H.W.   Eysker M.   in Veterinary Parasitology

ISSN:0304-4017|91|1|63-78

Elsevier‎(2000)‎

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By Van Loo P L P   Kruitwagen C L J J   Van Zutphen L F M   Koolhaas J M   Baumans V   in Animal Welfare

ISSN:0962-7286|9|3|281-295

Universities Federation for Animal Welfare‎(2000)‎

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