National Insurance contribution tables for use from 2 October 1978.
Great Britain.Department of Health and Social Security.
London : DHSS,
1978.
v. 1: Mariners in home-trade vessels and registered dock-workers (CF 395) -- v. 2 : Mariners in foreign-going vessels (CF 396) -- v. 3 : Mariners in foreign-going vessels and deep-sea fishing vessels.