RT Journal Article SR Electronic T1 Quit and win Wales: an evaluation of the 1990 pilot contest JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 114 DO 10.1136/tc.2.2.114 VO 2 IS 2 A1 C. Roberts A1 C. Smith A1 J. Catford YR 1993 UL http://tobaccocontrol.bmj.com/content/2/2/114.abstract AB