1. Radiation exposure of the UK population-1993 review;Hughes,1993
2. individual and collective dose rates from naturally-occurring radionuclides in seafood;Pentreath,1989
3. R.F. Clayton and E.J. Bradley, Evaluation of methods for the analysis of 210Pb and 210Po in environmental materials, Chilton, NRPB-M526.
4. The ratio of lead-210 to polonium-210 in the U.K. diet;Smith-Briggs;Sci. Total Environ.,1986