1. Bowers GN, Fassett JD, White E (1993) Anal Chem 65:475R-479R
2. Certificate of Analysis (1984) SRM 955, Lead in Blood, Gaithersburg, MD, USA
3. Machlan LA, Gramlich JW, Murphy TJ, Barnes IL (1974) In: Accuracy in trace analysis: sampling, sample handling, and analysis. NBS Special Publication 442
4. Chow T, Patterson CC, Settle D (1974) Nature 251:159
5. Patterson CC, Settle D (1977) Mar Biol 39:289