RT Journal Article SR Electronic T1 Adolescents' awareness of, and involvement with, illicit tobacco in the UK JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 521 OP 522 DO 10.1136/tc.2009.034967 VO 19 IS 6 A1 Crawford Moodie A1 Anne Marie Mackintosh A1 Robert West YR 2010 UL http://tobaccocontrol.bmj.com/content/19/6/521.abstract AB