References
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- Cantillo , A. Y. and Parris , R. M. 1994 . National Status and Trends Program Quality Assurance Project: Trace Organic Intercomparison Exercise Results 1986–1990 NOAA Tech. Memo. NOS/ORCA 69
- Cantillo , A. Y. 1995 . NS&T Quality Assurance Project Intercomparison Exercise Results 1991–1993 NOAA Tech. Memo. 79 NOS/ORCA
- IUPAC The International Harmonized Protocol for the Proficiency Testing of (Chemical) Analytical Laboratories . 1993 . Pure & Appl. Chem. , 65 : 2123 – 2144 .