By Entwisle A. Catherine   Williams Alison C.   Mann Peter J.   Russell Joanne   Slack Philip T.   Gilbert John   in Journal of AOAC International

ISSN:1944-7922|84|2|444-450

AOAC International‎(2001)‎

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By Entwisle A. Catherine   Williams Alison C.   Mann Peter J.   Slack Philip T.   Gilbert John   in Journal of AOAC International

ISSN:1944-7922|83|6|1377-1383

AOAC International‎(2000)‎

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By Price Gregory W   Hills Samantha   Mann Peter J   in International Journal of Psychiatry in Clinical Practice

ISSN:1365-1501|6|2|95-102

Ashgate Publishing Ltd‎(2002)‎

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