1. HMIP, Sampling and Measurement of Radionuclides in the Environment, a Report by the Methodology Sub-group to the Radioactivity Research and Environmental Monitoring Committee, Her Majesty's Inspectorate of Pollution, HMSO, London, 1989.
2. MAFF Contract Report;A. D. Horrill,1994
3. Technical Reports Series;IAEA,1970
4. Technical Reports Series;IAEA,1975
5. Technical Reports Series;IAEA,1989