By Wells D.L.   Hepper P.G.   in Applied Animal Behaviour Science

ISSN:0168-1591|84|4|297-305

Elsevier‎(2003)‎

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By Wells D.L.   Egli J.M.   in Applied Animal Behaviour Science

ISSN:0168-1591|85|1|107-119

Elsevier‎(2004)‎

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By Wells D L   Graham L   Hepper P G   in Animal Welfare

ISSN:0962-7286|11|4|385-393

Universities Federation for Animal Welfare‎(2002)‎

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By Wells D L   Graham L   Hepper P G   in Animal Welfare

ISSN:0962-7286|11|3|317-325

Universities Federation for Animal Welfare‎(2002)‎

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By Doherty L. M.   Wells D. L.   Burns K. R.   in Total Quality Management

ISSN:1360-0613|8|2-3|135-140

Routledge Ltd‎(1997)‎

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