By Ott S.L.   Johnson R.   Wells S.J.   in Preventive Veterinary Medicine

ISSN:0167-5877|61|4|249-262

Elsevier‎(2003)‎

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By Wells S. J.   Fedorka-Cray P. J.   Dargatz D. A.   Ferris K.   Green A.   in Journal of Food Protection

ISSN:0362-028X|64|1|3-11

International Association for Food Protection‎(2001)‎

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