Abstract
References
1.Government Actuary (1956 ) Fifth Interim Report on the National Insurance Act . London
2.Government Actuary (1964 ) Report on the Third Quinquennial Review . London
3.Ministry of Health (1963 ) On the State of the Public Health . London
4.Ministry of Labour (1964 ) Sick Pay Schemes . London
5.Ministry of Pensions and National Insurance (1964 ) Report on an Enquiry into the Incidence of Incapacity for Work . London
6.
Morris
J N
(1964 ) Uses of Epidemiology . 2nd ed. Edinburgh & London