RT Journal Article SR Electronic T1 Tobacco-free United Nations JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 248 DO 10.1136/tc.2.3.248a VO 2 IS 3 A1 M. Conley YR 1993 UL http://tobaccocontrol.bmj.com/content/2/3/248.1.abstract AB