RT Journal Article SR Electronic T1 Data on sickness absence in some recent publications of the Ministry of Pensions and National Insurance. JF British Journal of Preventive & Social Medicine JO Br J Prev Soc Med FD BMJ Publishing Group Ltd SP 1 OP 6 DO 10.1136/jech.21.1.1 VO 21 IS 1 A1 Alderson, M R YR 1967 UL http://jech.bmj.com/content/21/1/1.abstract AB