By Economou A.   Fielden P. R.   Packham A. J.   Woollaston E. J.   Snook R. D.   in The Analyst

ISSN:0003-2654|1997|11|1331-1334

R S C Publications‎(1997)‎

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By Packham A.J.   in TrAC Trends in Analytical Chemistry

ISSN:0165-9936|15|7|257-259

Elsevier‎(1996)‎

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By Tobin M D   Packham C J   in British Journal of General Practice

ISSN:1478-5242|49|441|291-294

Royal College of General Practitioners‎(1999)‎

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