RT Journal Article SR Electronic T1 The social patterning of teenage pregnancy JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 5 OP 5 DO 10.1136/jech.55.1.5 VO 55 IS 1 A1 SPENCER, NICK YR 2001 UL http://jech.bmj.com/content/55/1/5.abstract AB