By Hartley WJ   Clarkson DJ   in New Zealand Veterinary Journal

ISSN:1176-0710|37|4|158-159

Taylor & Francis Ltd‎(1989)‎

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By Tervit HR   Goold PG   McKenzie RD   Clarkson DJ   in New Zealand Veterinary Journal

ISSN:1176-0710|31|5|67-70

Taylor & Francis Ltd‎(1983)‎

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By Tervit HR   Goold PG   McKenzie RD   Clarkson DJ   Drummond J   in New Zealand Veterinary Journal

ISSN:1176-0710|33|5|78-80

Taylor & Francis Ltd‎(1985)‎

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