ALARA : principles, practice and consequences : proceedings of the symposium on ALARA - Quantitative Optimization Techniques for Radiation Protection in the Nuclear Industry, held by the Institution of Nuclear Engineers, London 18 September 1986 - Symposium on ALARA - Quantitative Optimization Techniques for Radiation Protection in the Nuclear Industry; Lakey, J. R. A.; Lewins, Jeffery; Institution of Nuclear Engineers (Great Britain) (Hilger, 1987)