RT Journal Article SR Electronic T1 Patterns of mortality in middle and early old age in the county boroughs of England and Wales. JF British Journal of Preventive & Social Medicine JO Br J Prev Soc Med FD BMJ Publishing Group Ltd SP 133 OP 140 DO 10.1136/jech.23.3.133 VO 23 IS 3 A1 M J Gardner A1 M D Crawford A1 J N Morris YR 1969 UL http://jech.bmj.com/content/23/3/133.abstract AB