By Patterson J.L.   Forker L.B.   Hanna J.B.   in European Journal of Purchasing and Supply Management

ISSN:0969-7012|5|2|85-93

Elsevier‎(1999)‎

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By Patterson J.L.   Willis H.J.   Kirkwood R.N.   Foxcroft G.R.   in Theriogenology

ISSN:0093-691X|56|5|913-921

Elsevier‎(2001)‎

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By Patterson J.L.   Willis H.J.   Kirkwood R.N.   Foxcroft G.R.   in Theriogenology

ISSN:0093-691X|57|8|2015-2025

Elsevier‎(2002)‎

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