By Wills PR   in New Zealand Veterinary Journal

ISSN:1176-0710|43|2|86-87

Taylor & Francis Ltd‎(1995)‎

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By Wills PR   in New Zealand Veterinary Journal

ISSN:1176-0710|44|1|33-36

Taylor & Francis Ltd‎(1996)‎

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By Wills PR   in New Zealand Veterinary Journal

ISSN:1176-0710|39|2|41-45

Taylor & Francis Ltd‎(1991)‎

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By Nieselt-Struwe K.   Wills P.R.   in Journal of Theoretical Biology

ISSN:0022-5193|187|1|1-14

Academic Press‎(1997)‎

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