1. International Atomic Energy Agency, Austria (1980) AQCS 1988: Analytical Quality Control Services
2. Parr RM (1985) IAEA biological reference materials. In: Wolf WR (ed) Proceedings of Symposium on Biological Reference Materials: availability, uses and need for validation of nutrient measurement. Philadelphia, USA, Sept 1983. Wiley, New York, pp 45–62
3. Klein PD, Klein RE (1987) Stable isotope usage in developing countries: safe tracer tools to measure human nutritional status. IAEA Bull 4:41–44
4. Versieck J, Vanballenberghe L, De Kesel A, Hoste J, Wallaeys B, Vandenhaute J, Baeck N, Steyaert H, Byrne AR, Sunderman FW Jr (1988) Certification of a second-generation biological reference material (freeze-dried human serum) for trace element determinations. Anal Chim Acta 204:63–75
5. International Council for Control of Iodine Deficiency Disorders (1985) IDD Newsletter 1/1 [see also Lancet, Nov 26 (1983), p 1244]